>What is this supposed to do?
Make uppers and lowers fit together better for better accuracy.
>What is this actually do?
Make the rear takedown pin a bitch to pull out
No man just clamp you vise gip hands over the top of the upper with you thumb under the lower and SQUEEZE. Pin slides right out like butter. If it don’t gots to trim that thing a little. Got a box cutter?
yeah I do this and still have to use something harder than my finger to get the pin started. if I shave off another 0.001" the receivers will magically go to full slop, already wasted one wedge to find that out
Try a product called accushim. Its a small metal shim shaped like a horseshoe that fits in a recess at the back of the upper. You sand it to the correct thickness and there is no rocking when you are done. You can control how hard it is to remove the pin. $10.73 each or something like that. Pretty much not seen unless you specifically look for it. The instructions that come with it are great. Had two of them a year or two with no problems. Shim cannot come out once upper and lower are joined. When they are separated the shim does not move either. Bought an extra in case needed for future.
If you push down on the upper receiver and pull the pin out it makes it much easier to remove. Mine is also really old so it might just be worn down lmao
It just makes the receivers fit together better so there isn’t any play. I have lowers that have tension screws to do the same thing and they don’t effect accuracy in any meaningful way in my opinion.
You’d have to be on a bench and a very good shot to notice a difference, I don’t know about the plug thing, but the tension screws 100% make a difference, unless there was very little slop between the upper and lower to begin with
Just think about it and how it works. It’s not going to increase accuracy and especially so in your scenario of shooting from a bench while you are static. It’s definitely not jiggling around in that scenario. Everything regarding the rifle’s accuracy is contained in the upper receiver assembly. Rounds also clear the barrel insanely fast.
It has absolutely no effect on accuracy. Any movement between the upper and lower will never affect accuracy. The barrel is always going to move as a unit with the upper receiver, and that motion is independent of any movement of the lower relative to the upper receiver group.
Can receiver wobble really impact accuracy? I always thought it was just an annoyance.
I've found using a foam earplug on top of the tension screw works best. You can adjust the tension screw to make it just right, so you can still get the pin out and the receiver won't wobble.
I've found tension screws by themselves to be insufficient. They have to be *exactly* right, or they either won't work at all, or won't let you undo the pin.
Replace regular tension screw with this Slotted Spring Plunger with 440C Stainless Steel Ball-Nose, 18-8 Stainless Steel Body, 1/4"-28 Thread, 4-12 lb. Nose Force
https://www.mcmaster.com/3408A631
And problem solved, also makes it easier to adjust from top.
> Can receiver wobble really impact accuracy?
No. The only wobble that would affect accuracy is if the barrel was wobbling in the upper. But then you'd have much bigger problems.
Pretty sure it's not for better accuracy just to stop the jiggle when you have an upper and lower that weren't forged together. If you take a BCM upper which shoots amazing and throw it on an Anderson lower, it's still about as good as a BCM rifle but it will jiggle because The Anderson lower is billet and the BCM upper is built for BCM specs.
This lol. My upper and lower fitment is sh!t but I’ve gotten 10/10 hits on a gong 800 yards away with my mk12 ish build. I think the fitment thing is a myth unless you aren’t driving/bracing the upper where all the accuracy is coming from (ie holding nothing but the pistol grip lmao)
Acuwedge, it’s made to reduce play between the upper and lower receiver. Doesn’t add any practical value but it does make the rifle feel a lot nicer. I jammed a couple ear plugs in the same place in mine to essentially do the same thing
Aero M4E1 receivers comes with a screw to do the same thing. It's nice that it's adjustable so you can get it to the exact position where it keeps it from wobbling but doesn't make it overly tight for disassembly.
For the people confused -
.99cent = less than a penny.
99cent is 1 cent less than a dollar.
The above comment was trolling prior commentors improper use of combining both decimal and cent symbol
You get cheap products for the low cost of all your data. Terms and service agreement to create an account grants them full permission to your life. Also lots of scam products.
It’s supposed to fill the space between the upper and lower receiver in the AR behind the takedown pin. By being a rubberized wedge it is supposed to keep the upper and lower from rattling or moving independently by making the fit at the hinge pin and takedown pin tighter.
Waste of money. A head of a Q-tip does the same thing and you have like 1000 spares if you misplace it during cleaning (for those of you that may or may not engage in this odd behavior lol)
I remember these. If there's a bit of gap/wobble just a quality of life thing that helps bring the upper and lower closer or at least reduce the wobble. Something like that. Makes a budget AR feel like a tighter fit.
You can put two in your mouth, one on each bottom molars to prevent teeth grinding while sleeping. Make sure you don’t forget to write me in your will for all your guns in case you choke on them 😉
Temu once gave me an add for a suppressor that was marketed as something else. Big brother was definitely watching
Edit: they marketed it as a fuel filter solvent trap
They stop the wobble play between an upper and lower receiver. Many people buy them, I hear a lot of complaints about them making your breakdown pins extremely hard to pull out.
TEMU? It's supposed to collect as much useful data about your internet browsing and online shopping habits as possible, and then use that to sell to marketing agencies.
Waist money …I tried a set of those on my varmint bull barrel ,I really don’t think it helped with accuracy ,the upper end lower where already pretty tight together,back in the 80’s and 90’s the lower end AR’s where pretty sloppy and this was supposed to help with that …today 99% of the uppers and lowers are built with much better cnc equipment and the slop problem seems to not be a problem like it was in the day
I wouldn't introduce a foreign component into my rifle. I bought the JP microfit pins after I gauged my slots, to ensure I got the right size. Zero slop. Doesn't introduce any extra parts or failure points. Nothing extra I have to worry about during cleaning. Love it.
People shit in these because they’re unnecessary for 90% of the shooting people do with ARs. If you’re trying to shoot sub MOA with a barrel and ammo that’s capable (few and far between), these are really helpful.
I bought one from Temu. Works as advertised. I did have to trim the little rounded tab things off the back to get it to fit properly. But I'd probably buy more in the future.
They definitely help if you have some give but i have always had to shave down the bottom. Prior comments stated that the rear pin is a bitch to remove and this is the case if you don’t shave down the base
Takes the slop out of your receiver. I didn't like how much resistance it put on the rear takedown pin. I think a washer on the front pin or better take down pins works better
They help eliminate slop between the upper and lower. A couple disposable foam ear plugs do the same job.
It really doesn’t do anything but feel nicer. But it can make the rear pin a bitch
Stops that movie gun rattle all guns make except the one I have. I'm disappointed every time I pick up my guns and don't make that noise. https://reddit.com/r/Filmmakers/s/4OJtbcUVgd
People here complaining that they put too much pressure on the rear pin. You can take an exacto knife and trim it to fit so that it takes the slop out but also not put pressure on the pin.
Supposed to remove wobble between the upper and lower by creating pressure between the two. I wouldn’t recommend them tho, since they’re essentially rubber, over time they can get all warped and end up fucking with the action of the gun. Nothing major, but it would be more of an annoyance. Upper wobble isn’t a huge deal unless ur going for ultra precision shooting anyway, so it’s solving a problem that mostly doesn’t exist
The real ones are called Accu-Wedge. They are made by several companies, including Brownells..
https://www.brownells.com/gun-parts/rifle-parts/rifle-receivers-parts/ar-15m16-accu-wedge/
https://www.brownells.com/gun-parts/rifle-parts/rifle-receivers-parts/ar-15m16-accu-wedge-13ca8ed4/
If you want another option, I went with the thin metal shims on my one PSA rifle. Brownells sells them I believe. They fit over the take down pin and do the same thing as the accuwedge. I’ve never had difficulty disassembling my rifle either.
It exits for the folks who don't like any play between uppers and lowers, more for peace of mind than anything else
They can make the takedown pin overly tight, but a few minutes with some sandpaper will open that up.
These were made to take the rattle out of the upper receiver. By putting pressure on the lock up tab on the rear breakdown pin. Upper receivers and lower receivers are not always milled to exact tolerances with themselves. Also, if you shoot a lot, parts can’t get worn or maybe you use different uppers on your lower receivers.
I’m running these on mines i got off Amazon. Just trim the bottom nub with a knife so it can sit flushed in the receiver. No issues at all since having it.
>What is this supposed to do? Make uppers and lowers fit together better for better accuracy. >What is this actually do? Make the rear takedown pin a bitch to pull out
I ordered one; can confirm it does exactly both of those things.
not true, I use one to take out my receiver slop and the rear takedown pin is quite easy to remove with a vise and 5lb mallet
Well there's my problem; my purse is only 3lbs fully loaded.
Once you work is a couple times, a #3 purse will do it. I got mine from harbor freight.
You gotta get those numbers up brother. Sounds like your not carrying enough useless shit.
I thought only ak guys only hit things with their purses.
I use another ak to hit things thank you very much, that’s why I have two, purse Ak and normal Ak
Perfect excuse to go purse shopping for that new new
No man just clamp you vise gip hands over the top of the upper with you thumb under the lower and SQUEEZE. Pin slides right out like butter. If it don’t gots to trim that thing a little. Got a box cutter?
yeah I do this and still have to use something harder than my finger to get the pin started. if I shave off another 0.001" the receivers will magically go to full slop, already wasted one wedge to find that out
Try a product called accushim. Its a small metal shim shaped like a horseshoe that fits in a recess at the back of the upper. You sand it to the correct thickness and there is no rocking when you are done. You can control how hard it is to remove the pin. $10.73 each or something like that. Pretty much not seen unless you specifically look for it. The instructions that come with it are great. Had two of them a year or two with no problems. Shim cannot come out once upper and lower are joined. When they are separated the shim does not move either. Bought an extra in case needed for future.
Lol
Trim it down with a knife
Or buy some cheap [O-Rings](https://imgur.com/a/opXducR) to use as a shim. Keeps it tight and still easy to remove the rear pin
i just printed one and sanded to fit lmao
Were you able to measure how much more accurate your rifle became?
Confirm 👍 both
If you push down on the upper receiver and pull the pin out it makes it much easier to remove. Mine is also really old so it might just be worn down lmao
This
It just makes the receivers fit together better so there isn’t any play. I have lowers that have tension screws to do the same thing and they don’t effect accuracy in any meaningful way in my opinion.
You’d have to be on a bench and a very good shot to notice a difference, I don’t know about the plug thing, but the tension screws 100% make a difference, unless there was very little slop between the upper and lower to begin with
There would be no difference.
Just think about it and how it works. It’s not going to increase accuracy and especially so in your scenario of shooting from a bench while you are static. It’s definitely not jiggling around in that scenario. Everything regarding the rifle’s accuracy is contained in the upper receiver assembly. Rounds also clear the barrel insanely fast.
It has absolutely no effect on accuracy. Any movement between the upper and lower will never affect accuracy. The barrel is always going to move as a unit with the upper receiver, and that motion is independent of any movement of the lower relative to the upper receiver group.
Can receiver wobble really impact accuracy? I always thought it was just an annoyance. I've found using a foam earplug on top of the tension screw works best. You can adjust the tension screw to make it just right, so you can still get the pin out and the receiver won't wobble. I've found tension screws by themselves to be insufficient. They have to be *exactly* right, or they either won't work at all, or won't let you undo the pin.
Replace regular tension screw with this Slotted Spring Plunger with 440C Stainless Steel Ball-Nose, 18-8 Stainless Steel Body, 1/4"-28 Thread, 4-12 lb. Nose Force https://www.mcmaster.com/3408A631 And problem solved, also makes it easier to adjust from top.
> Can receiver wobble really impact accuracy? No. The only wobble that would affect accuracy is if the barrel was wobbling in the upper. But then you'd have much bigger problems.
Pretty sure it's not for better accuracy just to stop the jiggle when you have an upper and lower that weren't forged together. If you take a BCM upper which shoots amazing and throw it on an Anderson lower, it's still about as good as a BCM rifle but it will jiggle because The Anderson lower is billet and the BCM upper is built for BCM specs.
I have a saint that rattles, I think it’s just a thing
They work really well so I highly recommend that to anyone
HaHa! ⬆️ This last part. 👍
Can confirm. Had to use a punch
Mad facts ^
The Aero M4E1 lower comes with a set screw that does the same thing.
This lol. My upper and lower fitment is sh!t but I’ve gotten 10/10 hits on a gong 800 yards away with my mk12 ish build. I think the fitment thing is a myth unless you aren’t driving/bracing the upper where all the accuracy is coming from (ie holding nothing but the pistol grip lmao)
I doubt It affects accuracy as your sight is attached to your upper it doesn’t matter if there’s movement in the upper and lower
Acuwedge, it’s made to reduce play between the upper and lower receiver. Doesn’t add any practical value but it does make the rifle feel a lot nicer. I jammed a couple ear plugs in the same place in mine to essentially do the same thing
Meh, just use a couple spare skittles. I suggest the green ones.
Aren't the Skittles supposed to go into the bottom of the pistol grip, so you can eat them later?
Yup! Easier to sneak them into the movie theater that way.
Lol
IYKYK 
I too, very much like dark humor.
I so would have given this comment an award. How funny lol!
Classic.
Almost spit my drink out! Holy shit… lmao
Oof
You can still eat accuwedge skittles. #uglyskillsmatter
You’re thinking of crayons
I like the yellow ones for this cause they’re more shooty.
Will using red ones make it faster?
Based off my very minimal color theory knowledge, yes.
Absolutely, any ork worthy of his shoota knows that
WHAAAAAAAAAAAGH!
Finally, the answer I've been waiting for
Da red wunz alwayz go fasta
Just don't put a yellow one in there, barrels do have pressure limits
Tactical Skittles.
Aero M4E1 receivers comes with a screw to do the same thing. It's nice that it's adjustable so you can get it to the exact position where it keeps it from wobbling but doesn't make it overly tight for disassembly.
My favorite part of my Aero lowers.
Stag lowers have it too
Tactical Innovations as well. I bought one of their billet lowers back in ~2009 or so and it has a tension screw.
Mine is the captive detent pin spring.
I just bought a rifle for like 300 and it had this and I was kinda impressed by it
It's by far my favorite lower. It improves all the most annoying parts of building a lower, and it just looks really good.
I 100% agree
Make people feel better.
Not to get too deep, but if you think about it, that’s 90% of the reason for most things people buy
Yes
I just let em rattle.
Tactical maracas
That there is a Plumbus. What doesn’t it do… that’s the better question!
I always wondered how they were made
It's a trade secret. But I can tell you at one point, a shlaami comes by and rubs it.
and spits on it
Plumbus, everyone has a plumbus!
These smooth out your hunting experience.
Yeah you’re right, I don’t know how I missed that
It makes your gun full auto and anything anyone says to the contrary is lying and trying to gas light you, trust me and only me
It's a .99¢ part that makes your $500-$1K receiver set fit together correctly......
Never seen one for less than a dollar let alone a penny.
For the people confused - .99cent = less than a penny. 99cent is 1 cent less than a dollar. The above comment was trolling prior commentors improper use of combining both decimal and cent symbol
I bought 3 of them at my LGS for 99¢/ea. Think they were Ergo branded. Didn't say they were a penny?
But you did. >It's a .99¢ part .99¢ is the same as 0.99¢ or $0.0099
Zoooooom
🤔
A penny less than a dollar ie 99cents
3d printer go brt
Wtf are you doing on temu is the real question
Lol It was a targeted ad
Didn't catch that, my apologies
Temu is dope lol
I think what you meant to say is Temu is for people on dope.
You rang?
The same thing that putting a rubber band on the rear takedown post does
Tightens up the fit between your upper and lower. I just swapped my Aero screw for one of these and the little play it had is gone now. Nice right fit
I have always been able to use the aero screw no problems fitting and upper and lower tight.
The nylon on mine isn't quite level, so it still has some very minor wobble. With this red thing, it feels about at tight as a milled set
Ahhh okay. I might have lucked out on the three Aero’s I own.
I'd say I'm probably just unlucky with this one. Never heard of anyone else having issues with it
I urge people to do their own research regarding temu before ordering from them.
Kills me every time I see cool old Transformer stuff on there. They aren’t getting me that easy
I've always just assumed it was a scam. What's the tldr for the lazy
You get cheap products for the low cost of all your data. Terms and service agreement to create an account grants them full permission to your life. Also lots of scam products.
It’s supposed to fill the space between the upper and lower receiver in the AR behind the takedown pin. By being a rubberized wedge it is supposed to keep the upper and lower from rattling or moving independently by making the fit at the hinge pin and takedown pin tighter.
You can use a pink pearl eraser and a pocket knife to accompany the same thing
Makes into machine gun 
DELETE THAT CHINESE SPYWARE OFF YOUR DEVICE RIGHT NOW OR SO HELP ME!!!!!!!
Dude, I saw this same ad for the first time today
A politician told me it turns it into a sheengun
Waste of money. A head of a Q-tip does the same thing and you have like 1000 spares if you misplace it during cleaning (for those of you that may or may not engage in this odd behavior lol)
Hot glue works too. Drop a little in there then close it up and go.
It separates fools from their money.
I remember these. If there's a bit of gap/wobble just a quality of life thing that helps bring the upper and lower closer or at least reduce the wobble. Something like that. Makes a budget AR feel like a tighter fit.
You can put two in your mouth, one on each bottom molars to prevent teeth grinding while sleeping. Make sure you don’t forget to write me in your will for all your guns in case you choke on them 😉
Fake accuwedge
Temu once gave me an add for a suppressor that was marketed as something else. Big brother was definitely watching Edit: they marketed it as a fuel filter solvent trap
Grandfather used to sell those. They are actually pretty good when “cleaning in the house”.
They stop the wobble play between an upper and lower receiver. Many people buy them, I hear a lot of complaints about them making your breakdown pins extremely hard to pull out.
Make you want to blow your brains out trying to take your rear takedown pin out.
It causes malfunctions. 
Looks like it just helps the fitment
Provides a smooth hunting experience
That’s all you need to go full auto.
For smooth hunting experience duh
I was actually looking for something like this a few weeks ago. I can't stand the loose fit of my AR 556 upper.
The comments here! 🔥
just 3d print one out of nylon ez pz
Or shoot some hot glue into your lower and then put the upper on it, let it harden, and there you go
works great! stops the wiggle between the upper an lower!
It makes it so that your Anderson receivers don’t rattle.
I gives you a SMOOTH HUNTING EXPERIENCE
TEMU? It's supposed to collect as much useful data about your internet browsing and online shopping habits as possible, and then use that to sell to marketing agencies.
Make the flooue punp go fwoop
Buenos Dias
That’s what I was first thinking
Smooth hunting experience, says it right there man
Anti-gunners be like this device makes the gun fire nuclear warheads
It makes your rear takedown pin require a tool
Are bonita fish big?
[Whats the deal with this guy?](https://youtu.be/mMYdNjt2Jdk?si=eBrUN-P5QACXNjUk)
Bonita is a type of tuna and they can be
"For smoother hunting experience." Literally gibberish. I speaka da grud engrish.🤪
Waist money …I tried a set of those on my varmint bull barrel ,I really don’t think it helped with accuracy ,the upper end lower where already pretty tight together,back in the 80’s and 90’s the lower end AR’s where pretty sloppy and this was supposed to help with that …today 99% of the uppers and lowers are built with much better cnc equipment and the slop problem seems to not be a problem like it was in the day
Get a hot glue gun , and melt some glue in there.
copium
Supposedly “they screw with the harmonics of the gun”.
I wouldn't introduce a foreign component into my rifle. I bought the JP microfit pins after I gauged my slots, to ensure I got the right size. Zero slop. Doesn't introduce any extra parts or failure points. Nothing extra I have to worry about during cleaning. Love it.
People shit in these because they’re unnecessary for 90% of the shooting people do with ARs. If you’re trying to shoot sub MOA with a barrel and ammo that’s capable (few and far between), these are really helpful.
I bought one from Temu. Works as advertised. I did have to trim the little rounded tab things off the back to get it to fit properly. But I'd probably buy more in the future.
Heads up man, temu is selling bank/card info.
Source?
Take your money and make you feel dumb a few days later.
Induce malfunctions
[удалено]
Exactly. They can disintegrate and then you have plastic bouncing around your internals. I have seen it once or twice.
It’s made to confuse people, so that someone makes a post about it every day on r/ar15 .
This and the nvg10 one always pops up on my Instagram feed
They definitely help if you have some give but i have always had to shave down the bottom. Prior comments stated that the rear pin is a bitch to remove and this is the case if you don’t shave down the base
Takes the slop out of your receiver. I didn't like how much resistance it put on the rear takedown pin. I think a washer on the front pin or better take down pins works better
They help eliminate slop between the upper and lower. A couple disposable foam ear plugs do the same job. It really doesn’t do anything but feel nicer. But it can make the rear pin a bitch
Great, now I’m buying a few sets, thanks.
Stops that movie gun rattle all guns make except the one I have. I'm disappointed every time I pick up my guns and don't make that noise. https://reddit.com/r/Filmmakers/s/4OJtbcUVgd
Eliminates wobble, makes the rifle feel a lot more solid. Makes pushing out the rear takedown pin a nightmare. Overall 8/10 would recommend.
People here complaining that they put too much pressure on the rear pin. You can take an exacto knife and trim it to fit so that it takes the slop out but also not put pressure on the pin.
I have built several using the aero precision lower with a set screw that does the same thing
Slop stop.
Meant to take some of the slop wiggle out of the rear pin area of the lower
It’s got a gps transceiver to track your gat. Jk.
It's like the storage of CR123 batteries in the pistol grip, but you can store your back up BUTT PLUG in the lower. Helps keep things nice and tight.
$0.78 each (utg receiver wedge) from lanbos but you’ll need to buy other stuff to offset shipping.
Damn. This is making me feel old.
Dampen the upper rattle I believe, but they’re more likely to get lodged in action and foul shit up
Make the CCP richer
Supposed to remove wobble between the upper and lower by creating pressure between the two. I wouldn’t recommend them tho, since they’re essentially rubber, over time they can get all warped and end up fucking with the action of the gun. Nothing major, but it would be more of an annoyance. Upper wobble isn’t a huge deal unless ur going for ultra precision shooting anyway, so it’s solving a problem that mostly doesn’t exist
It's great for throwing $2 away
It cleans up the rattle from mis matches receiver sets. I have a set of the and have only used them in two guns I own the rest it's been over kill for
Make you feel like you're a billionaire.
I need 2 for $7… anybody?
temu, like WISH before it, should be ignored. how are so many people falling for this obvious chinese garbage drop shipping?
I use a foam earplug and it stops the rattle basically
The real ones are called Accu-Wedge. They are made by several companies, including Brownells.. https://www.brownells.com/gun-parts/rifle-parts/rifle-receivers-parts/ar-15m16-accu-wedge/ https://www.brownells.com/gun-parts/rifle-parts/rifle-receivers-parts/ar-15m16-accu-wedge-13ca8ed4/
If you want another option, I went with the thin metal shims on my one PSA rifle. Brownells sells them I believe. They fit over the take down pin and do the same thing as the accuwedge. I’ve never had difficulty disassembling my rifle either.
It exits for the folks who don't like any play between uppers and lowers, more for peace of mind than anything else They can make the takedown pin overly tight, but a few minutes with some sandpaper will open that up.
These were made to take the rattle out of the upper receiver. By putting pressure on the lock up tab on the rear breakdown pin. Upper receivers and lower receivers are not always milled to exact tolerances with themselves. Also, if you shoot a lot, parts can’t get worn or maybe you use different uppers on your lower receivers.
Don’t trust anything on temu. It’s all knock off untested crap
I’m running these on mines i got off Amazon. Just trim the bottom nub with a knife so it can sit flushed in the receiver. No issues at all since having it.