14.5 with A2 flash hider

[landser1102]

Anybody know if a 14.5 barrel with a standard A2 flash hider is long enough to meet the 16" requirement?

[Telperion]

It isn't. You can use an extended A2 flash hider:

http://www.bravocompanyusa.com/Sabre-Defence-Extended-A2-Flash-Hider-p/sabre%20ext%20a2%20fh%2060070.htm

It will need to be permanently attached through an ATF approved method.

[cmace22]

I went with the PWS FSC556 brought it to 16.1"

[mike22ca]

I went with the PWS FSC556 brought it to 16.1"

Im lookin to do roughly the same thing.... who did your work for you or did u do it yourself?

[dfletcher]

I think the A2 requires a 14.7" bbl - pretty sure that's how the one I bought was advertised.

[kingjoey]

The A2 is about 1/3" too short.

[aplinker]

No, too short.

You have a number of options out there to use that get it to 16"

[PatriotnMore]

No, too short.

You have a number of options out there to use that get it to 16"

Could you please explain the options?

Also, what constitutes "permanent"? Does using locktite, or some type of glue on threads considered permanent?

[heycorey]

Could you please explain the options?

Also, what constitutes "permanent"? Does using locktite, or some type of glue on threads considered permanent?

Scroll down to Post #7.

[PatriotnMore]

I read the click me, but I still don't see the answers to my questions, did I miss it?

"1.) Barrel length: For the vast majority of shooters we recommend a 16" barrel. It's a good compromise between velocity, controllability, weight and flexibility. The flexibility comes from the 16" barrel requirement Federally for ALL rifles. If a barrel less than 16" were used the muzzle device would need to be PERMANENTLY attached, which would prevent the user from swapping out between, say, a brake (for a featureless build) or upgrading down the road without visiting a gunsmith. Shorter allows for more control (when shooting on the move), while longer enhances velocity, effective range and improves long range accuracy. It might be surprising, but shorter and stiffer barrels are far more accurate at short ranges. Longer barrels improve their deficiencies in intrinsic accuracy at long ranges by causing the bullets to be less effected by wind/conditions/operator error - due to their higher velocity. The question of barrel length is also a question of how you intend to shoot. Longer, heavier barrels are best suited for shooting from fixed positions (bench, prone, etc.). Again, the 16" barrel tends to be a good compromise for most people looking for a flexible gun as their 1st AR."

[scootergmc]

Read this thread, scroll down to the post that has the "HOW TO PERMANENTLY ATTACH A MUZZLE DEVICE"

http://www.ar15.com/forums/topic.html?b=3&f=4&t=226782

It has the ATF definition.

[PatriotnMore]

Read this thread, scroll down to the post that has the "HOW TO PERMANENTLY ATTACH A MUZZLE DEVICE"

http://www.ar15.com/forums/topic.html?b=3&f=4&t=226782

It has the ATF definition.

Thanks, so a pin is the only way to be considered permanent?

[heycorey]

Pinning the attachment is a common method. You can also use hi-temp silver solder (1100deg+), which is reversible should you decide to do something different with the muzzle in the future.

On the other hand, "Industrial adhesive products are not an acceptable method for permanently attaching a muzzle device."


"Dear Mr. :

This refers to your letter of March 31, 1998, in which you ask
about permanently attaching a muzzle device to various firearms.

A muzzle device, such as a muzzle brake or barrel extension, which
is attached to a barrel by means of welding or high temperature
silver solder having a melting point of at least 1,100 degrees
Fahrenheit, is considered to be part of the barrel for purposes of
measurement. A seam weld extending at least one-half the
circumference of the barrel or four equidistant tack welds around
the circumference of the barrel are adequate for this purpose.

A firearm having a muzzle brake, cap, or barrel extension
permanently attached by those same methods to cover the threads on
a barrel, would not be considered to have a threaded muzzle.
Please note, however, that any muzzle device or barrel extension
which functions as a flash suppressor or grenade launcher would
still constitute one of the qualifying features of a semiautomatic
assault weapon as that term is defined in 18 U.S.C. section
921(a)(30(B). Industrial adhesive products are not an acceptable
method for permanently attaching a muzzle device."

[PatriotnMore]

^ Thank you, that's what I was looking for.