Muzzle Devices for 13.7" Barrel

[ar15barrels]

The only Surefire brakes that I know with certainty to be long enough to get you to 16" are the Socom (2.6" length) and Procomp (2.7" length) brakes.
Also the War Comp is 2.4" in length, just barely long enough to make legal length with a 13.7" barrel.

Too short.
He already HAS a pro-comp.
I measured the barrel at about 15.75" with the pro-comp and the crush washer installed.
Warcomp is longer than a procomp.
I pulled out a Warcomp from my scrap bin and installed it on his barrel and it was 15.87" long.

[n8vrmind]

Too short.





He needs at least a 3" long muzzle device.

Looks like OP needs a new barrel...

[Powder_Keg]

How about Strike Industries, King Comp?

Product Spec:
- Length: 2.62”
- OD: 0.87”
- Weight: 3.8 oz
- Materials: Steel
- Color: Black
- Caliber: .223/5.56 Thread Pitch: 1/2x28
- Caliber: .308/7.62 Thread Pitch: 5/8x24

https://www.strikeindustries.com/shop/products/ar/muzzle-device/king-comp.html

[Manh3]

Get this brake MB762SSAL/RE

Heck there’s one for sale here https://www.calguns.net/calgunforum/....php?t=1612253

[matt_b]

In 2013 ish, 13.7 barrels were pretty popular. This barrel length was made for the Noveske flaming pigs if I remember correctly.
The B.E. Meyers 249F just so happened to work out being over 16 because of how damn long it is.

[ar15barrels]

Looks like OP needs a new barrel...

He already HAS a brand new barrel.
He needs a BE Meyers flash suppressor.

[ar15barrels]

How about Strike Industries, King Comp?





https://www.strikeindustries.com/sho...king-comp.html

too short.

13.7" barrel
-0.63" threads
+0.12" crush washer
+2.6" perm attached muzzle device
=15.79" barrel length

[ar15barrels]

https://www.calguns.net/calgunforum/....php?t=1612253

Two problems.
First, his barrel is a 5.56 and has 1/2-28 threads so that 5/8-24 threaded brake will not thread on to his barrel.
Second, that brake overlaps the barrel by 3.37" and only adds 1.45" of length forward of his barrel's existing muzzle.
That would leave his barrel at about 15.2" long.

[ar15barrels]

This will get you over 16"

It is pricey though, Its what I used to get from 14.5 to 17

https://www.surefire.com/products/suppressors-division/muzzle-devices/socom-muzzle-brake/?sku=SFMB-556-1/2-28

13.7 + 2.6 = 16.3

Your formula does not account for the muzzle device being THREADED on to the barrel...
The muzzle device overlaps the barrel bu the length of the threads.
Actual formula is barrel length - thread length + muzzle device length.
13.7-0.6+2.6=15.7
14.5-0.6+2.6=16.5

[SCVlongstroke]

Warcomp yes I think it would. GT has a vid where Sons of Liberty used their NOX dead air and I’m almost positive they didn’t use shims or washers.

[ar15barrels]

Warcomp yes I think it would.

Warcomp is 2.7" long.

13.7"-0.6"+2.7"=15.8"

Is it really that hard for people to do the math?
Why does everyone forget about the fact that the muzzle device threads OVER the barrel so you LOSE the length of the threads when figuring out the finished barrel length?

He needs at least 3.0" of muzzle device in order to be at least 1/10" over 16" which should be safe to most LEO measuring methods.

GT has a vid where Sons of Liberty used their NOX dead air and I’m almost positive they didn’t use shims or washers.

The SOL NOX is 2.866" long.

13.7"-0.625"+2.866=15.941"
At least that's well within shimming range.
You normally have to shim a muzzle device to get it to time correctly.
If we use a crush washer, it would definitely work.

13.7"-0.625"+0.110"+2.866=16.051"

[Quickdraw559]

KAK flash cans are 3.25”

[Daze]

Noveske KX3 or KX5

The KX-3 and KX-5 Firepig's will accomplish the length your looking to achieve. Used on the Noveske Infidel series of rifles with 13.7" barrels.

https://noveske.com/products/gen-4-13-7-rifle

https://noveske.com/products/kx5-flash-suppressor

[Mute]

I checked JR rifles, I think it says will not ship to CA.

Give them a call. I've purchased plenty of items from them without issue. If not, there are other vendors who sell this brake.

[JamesY]

SJC Titan. As a bonus, you'll piss off your neighbors.