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Looking for input on AR barrel selection
#1
I'll finally be putting together my first AR lower this week, and with that, will begin making decisions and acquisitions for the upper half of the gun.

Other than some range shooting, the main purpose of this rifle will be a "house gun", so I want the barrel as short as possible without getting into NFA territory.

That said, I want to keep the barrel itself at 16", so I don't have to worry about any other muzzle devices being permanently attached in order to stay legal.

I'd also like to be prepared for an eventual suppressor attachment. As I understand it (I'm a newb), flash suppressors and/or compensators thread onto the end of the barrel, just as a suppressor would, but it's meant to be a semi-permanent installation, so it's not like you'd simply pop off a flash hider, use the suppressor as desired, and then run it back on when you remove the suppressor.

Is that understanding accurate?

That issue aside, would the barrel threading for a flash hider/compensator be the same as for a suppressor, or is my hope of having the same barrel readily accept either device misplaced?
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#2
Might want to rethink a full-sized house gun. That's a lot of barrel to be swinging around. Then add another 6-12" for a suppressor. Not my idea of a good time. Might I suggest building a pistol and adding a Sig Brace. No NFA. But if your gunna add a suppressor (tax stamp anyway) why not just do an SBR?
NRA Life Member, NRA Certified Instructor:  HFS, Pistol, Rifle, PPIH,PPOH
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#3
spblademaker;157621 Wrote:Might want to rethink a full-sized house gun. That's a lot of barrel to be swinging around. Then add another 6-12" for a suppressor. Not my idea of a good time. Might I suggest building a pistol and adding a Sig Brace. No NFA. But if your gunna add a suppressor (tax stamp anyway) why not just do an SBR?

Intent for the suppressor would be for "occasional/fun" use at the range, though it seems it's not as simple as it would be to run one on a .22 pistol as desired.

Any suppressor purchase is WAY down the road at this point, just trying to avoid doing something now that would add extra 'mechanical' hurdles if/when I get into sight of that goal.

This is my first carbine build, and don't want to dip my toe into NFA waters just yet.
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#4
Most of the suppressor makers have flash hiders that are also mounts. I personally have both Gemtech and Yankee Hill products and can't say enough good things about both in terms of flash hiders and mount functionality. Yankee Hill probably gets the nod for easiest on and off of the can. The Gemtech mount gets baked with carbon and can be a bit of a bear to break loose to get the can off. Both index perfectly every time and show repeatable POI shift.

The barrel threading is standard. Are you looking for just a barrel or a competed upper?
The law? The law is a human institution...
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#5
spblademaker;157621 Wrote:Might want to rethink a full-sized house gun. That's a lot of barrel to be swinging around. Then add another 6-12" for a suppressor. Not my idea of a good time. Might I suggest building a pistol and adding a Sig Brace. No NFA. But if your gunna add a suppressor (tax stamp anyway) why not just do an SBR?
Building as a pistol now might be a good idea. It can be SBRed later, but doing it out of the box adds $200+ for the stamp/application, $? for engraving, and 8 months to a year wait time ... IF his current CLEO will do an SBR sign-off. The politics of a supressor for hearing safety might be a little more lenient too. The SBR stamp and the Supressor stamp are $200 each - 2 different NFA items. (IIRC Machine Guns can go SBR without an additional stamp.)


G:
.22/.223 cal - 5.56mm THREAD-ON supressors, barrels, and muzzle devices are generally threaded 1/2-28 RH.
.30/.308 cal - 7.62mm THREAD-ON supressors, barrels, and muzzle devices are generally threaded 5/8-24 RH. (Assuming they are not AK style which use a weird metric thread)

There are supressors from quite a few manufacturers that are quick-attach styles that mount to either generic or proprietary flash-hiders/comps. That means if you select a system and populate your stable with the appropriate muzzle devices you can move the suppressor from gun to gun with "just a twist" (for calibers <= the can's rated caliber). And you'll still have the benefit of the hider/comp when shooting unsuppressed.

Yankee Hill has been doing this for years and their system is set up so a 7.62 can will go on a 5.56 muzzle device but you can't put a 5.56 can on a 7.62 muzzle device - idiot/lawyer proof.
Silencerco's SAKER line actually has adaptable mounts for several different quick-attach systems.
There are tons of others too. Serious research required to pick the right system for you, but lots of potential flexibility too.

If you want to do it now, and cheap, slap an A2 flash hider on a 1/2-28 threaded barrel and you are out <$10 when and if you decide to go with a fancier muzzle device or suppressed.

PM if to want to discuss via tel ...
-JD-, proud to be a member of pa2a.org since Sep 2012.
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#6
(11-30-2014, 05:46 PM)-JD- Wrote: Building as a pistol now might be a good idea. It can be SBRed later, but doing it out of the box adds $200+ for the stamp/application, $? for engraving, and 8 months to a year wait time ...

Alternatively going the entity route for NFA items opens the door to eforms. My last form 1 eform was 5 months.

All good points, I myself am partial to the SBR for home use. Once you get your hands on one it just makes sense.
The law? The law is a human institution...
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#7
csmith;157623 Wrote:The barrel threading is standard. Are you looking for just a barrel or a competed upper?

I'm looking for just a barrel. I want to piece the upper together myself, just as I did for the lower.

-JD-;157624 Wrote:If you want to do it now, and cheap, slap an A2 flash hider on a 1/2-28 threaded barrel and you are out <$10 when and if you decide to go with a fancier muzzle device or suppressed.

This is most likely what I will do. The main purpose here was to confirm that when I get to that stage I didn't suddenly realize "You'll need a different barrel too, because you didn't do your homework."

Thanks for all the input!
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