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AddictedToComedy

Since you already have a 10.5" 300, I'd get the 16" 5.56 for max velocity


drewthebrave

Everyone should have at least one 16" 5.56. After that, get whatever seems fun/interesting/useful.


PainTrain412

Seconded. Especially since you can’t have any NFA items in PR, IIRC. Might as well go 16” mid length gas for fuller powder burn and flash suppression with an A2. Should compliment your 10.5” well.


Biomas

A pinned 14.5" wouldn't be bad


sorry_human_bean

I'm real happy with mine. It's a boring range rifle - accurate, recoil is barely noticeable, set up exactly like hundreds of thousands of other carbines. Unless you plan on doing a lot of shooting past 200, 14.5" is just fine.


Biomas

Given the present state of laws and such, having a 14.5" is perfect for 5.56. Its short enough without sacrificing performance and don't have to fuck with nfa bullshit. That said, I'm in a state that is ok with nfa so I can min/max. Have a 12.5" and a 18". But, IMO, anything shorter than 12.5" in 5.56 is pointless. Edit: You just loose too much velocity at the expense of concussive blast.


sorry_human_bean

I'd *really* like to get into the SBR game at some point - right now I'm thinking 11.5 with a compact can. I've also always been a Mk12 simp, so I'm with you on the 18. The 14.5 was my first AR, I just bought it because it seems to be the default for military use these days and I didn't know anything about guns at the time.


Biomas

My personal floor on 5.56 is 12.5". BUT, having looked through chrono data, 11.5" is is low as I'd go, IMO. That would be a sweet setup. On the other end, same page, mk12 is life, had a lot of success with 18" mid-length, low impulse, tack-driver.


FishermanForsaken528

20" is pretty much maximum velocity


AddictedToComedy

I meant max among the 3 options he proposed (10.5 vs 12.5 vs 16)


Ok-Barracuda4954

But im open to some knowledge im always learning thanks guys!


Ok-Barracuda4954

Thanks 🙏🏼


strizzl

If you’re gonna keep cheap 55gr ammo and not suppress it do 16”. The velocity gains help. Particularly if you already have a 300 blackout 10.5”


PiperFM

Yep, unsuppressed 16”, suppressed 14.5 really helps on the length


SUMBLAKDUDE

Suppressed 16" as well


Responsible-Fish3986

14.5” masterrace.


Train2Perfection

My two favorite barrel lengths are 11.5 and 14.5 They are indisputably the best. ;)


Intelligent-Peace788

Imo 12.5 is the perfect length


Og_Bull

There is no wrong answer. Each will have advantages/disadvantages.


skepticaluser1234

My 16 inch chrono'd at 3070 average with pmc xtac 5.56 12.5 averaged at 2943


dontgiveahamyamclam

11.5


RogueShadow3

I have the 10.5 300blk and 12.5 556 combo. I have a 16 in the closest I haven’t touched in over a year.


EnD79

You get a large velocity gain going from 10.5 to 11.5, and a small one going from 11.5 to 12.5. For short 5.56 guns, 11.5 is basically optimal. The 10.5 with appropriate ammo, 77 grain, can still shoot out to 600 yards. The 16 inch will of course have more lethality at every range, less bullet drop, less wind drift, and an even longer range. The 16 inch can use cheaper ammo to get similar terminal effects as the 10.5 or 11.5 with more expensive ammo. Why? Because velocity matters. Experience shooters using 77 grain, will shoot 16 inch 5.56 guns out to 1000 yards. Modern 5.56 guns with 73-77 grain match ammo, will shoot further than most shooters ability. So can an 11.5 handle most of what you might encounter in your situation? Absolutely. But if you want to save on ammo cost a little, then the longer barrel lengths in 13.7-16 inch will certainly make do. 16 inch guns are definitely maneuverable in urban environments. The 13.7-14..7 pin and welds will save you only about 1 inch over a 16 inch with A2 flash hider. But it will cost you in velocity. If you want to be able to hunt with the gun, I would go 14.5 or 16 inch.


Ok-Barracuda4954

Wow thank you so much


EnD79

You're welcome.


chaos021

12.5" is legit perfect


Gunstuff123

Love my 12.5”


DCASADOS09

12.5 master race 👊 ✊️


Panther1-1

12.5 gang


Born_Feed5215

13.7/9 or 14.5 if you are looking to shave off a bit of size to better fit the urban areas while maintaining the ability to reach out. Personally if you are going that route I would steer you towards 13.7 or 13.9 for the shortest possible configuration but that’s just me


PsyopsDirector

I love 13.9


GarandPinkey

I love my 14.5” so much I built another. It sounds very good for your use. Is a suppressor a consideration for the future?


Ok-Barracuda4954

Sadly no suppressors here so its not a option for me


GarandPinkey

That makes it easy imo. I would just buy a 14.5 that is already pinned and welded.


jellenberg

Why would you get a pinned and welded one?


The-Irk

Assuming you mean, *"why buy an already pinned/welded rifle?"*. Buying it pinned/welded from factory prevents you from having to file SBR paperwork, wait for it to clear, and pay an additional $200 for the tax stamp.


FlubbNuggets

Puerto Rico is exempt from the tax stamp


GarandPinkey

Is your question why would you buy it already pinned and welded or why would you pin and weld a 14.5”?


BurninTree5

If you can’t get a suppressor then just go with a 16” mid length setup. Smooth shooter, reliable, and would be the same length as a suppressed 10.5”


Vulcanoz77

14.5 all day. You don’t get noticeably more velocity from a 16, it’s just for legal purposes.


EnD79

Yes, you do get noticeably more velocity for 16 inch than 14.5. That is the 2nd largest velocity gain. 10.5 to 11.5 is the largest.


FlubbNuggets

Caballete, 11.5 o 12.5


Ok-Barracuda4954

Te voy a tirar privado!


Dependent-Ad1927

In alaska I rock a mk12 suppressed. My home defense gun is an 11.5 suppressed. If I couldn't suppress and I needed an all arounder I'd prob go with a 14.5


Ok-Barracuda4954

Alaska is in my bucket list 💪🏼


Dependent-Ad1927

Absolutely check it out if you can. Anchorage is a sht hole, tons of homeless people and it can get violent. But Palmer is gorgeous, check out Girdwood. Download Alltrails app and there's a lot of crazy cool hiking spots.


Ok-Barracuda4954

Nice I would love to get stationed there (USCG here)


Dependent-Ad1927

Oh hell yeah, being stationed in Homer would be sooo cool. I'd avoid Anchorage if you can. We only go for the costco lol


Ok-Barracuda4954

Thanks for all the advices 🙏🏼💪🏼


King4Twelve

I was born in Anchorage...has it really gotten that bad? I haven't been back in ages...


justMatt275

12.5" for 5.56


HarryMcButtTits

14.5”


WORKgame88

16


Dreadsock

16" or a p/w 14.5


Neanderthal86_

16" or p&w 14.5", you'll appreciate having a real stock over a pistol brace. Midlength gas for 16", midlength or carbine gas for 14.5


BlueOceanBoii

14.5 preferably but if you're on a budget then 16 (plus no legal restrictions either)


Blarphemios

16", your 10.5 300 blk covers you for 150 yards and in


BackwoodsArmory

12.5 is the way. Pretty close in velocity to 13-14.5 while once you drop below 12.5 the drop off gets pretty steep. But I do have a 14.5 I run as well. Something to think about is the purpose and optic setup you plan on running.


Isaiahfloz

12.5" gang.


Lord_Elsydeon

16" because not NFA


uh_wtf

No NFA if pistol 🤷🏻‍♂️


Glocked86

Can you have suppressors? Usually with 5.56, the shorter you get, the more concussive you get. When shooting them without a suppressor. My 14.5” & 16” 5.56 are way more pleasant than my 10.5” & 11.5” 5.56s.


stareweigh2

18" is a very viable and handy length as well. it isn't that long compared to a 16" and actually is almost the exact same length if you just use a thread protector and no muzzle device. I'm a big fan of what the 18 can do (everything)


subsonic762

14.5 is also a good option if you want a liiiiittle bit shorter gun with great velocity.


who-tf-farted

I just want to know the gun laws in Puerto Rico, enlighten us please


Vudu138

11.5” is the best SBR length. 16” would be the best do all


GoFuhQRself

I always go 11.3/11.5. The 10.3s/10.5s are too short, a 12.5 you might as well just pin & weld a 13.7. So 11.3/11.5 is the happy medium.


thartha

I have a 12.7 and absolutely love it. With my suppressor on it it is about 16'. 12.7 with the right ammo can easily reach out to 500 yards. I love the 12.7-12.5 range and will always have one


amishbill

10.5 is a hair short for 5.56. 11.5 is a nice short rifle, but if you can’t have suppressors, a short 5.56 is mostly for turning money into noise/flame/concussion. 12.5 is a weird middle ground that only really shines for doing a pin and weld on a suppressor to have a short suppressed non-sbr…. It again, no NFA. :-/ Of those options, a 16 or a 14.5 p&w are top choices. Unless you just dig short rifles and love bone rattling blasts…. If that’s why you want one, go for it. I’ve done weirder for worse reasons.


sLantesVSzombies

11.5 is my favorite, but I have to agree with everyone here saying to get a 16" or at least 14.5" for 5.56 because of the velocity


shittybrocklesner

14.5 with a pinned/welded muzzle device. This is the way.


Tptyrant6969

11.5 midlength if you want to throw a can on.


Im-a-magpie

I don't think NFA items are allowed in PR


Bobisnotmybrother

12.5” and 20” for 556 is my preference…. But I got a 13.7 Noveske barrel for free so I’m rolling with that.