Which caliber for this AR build?

[Hueco]

I bought this set for one of Aero's monthly dealios and am now looking to finish up the build. The hand guard is roughly 9.5" so I'm looking at barrels in the ~10.5 - 12" range.

What I'm having trouble deciding is the caliber. Could do a dedicated .22LR trainer but meh. It's short and loud if I go with 5.56. Little long for .300 subs but would work. Could get an adjustable gas block and go for a jack of all trades .300.

No use cases for this one. It's a fun gun. Whatever it winds up as is how it'll get used.

What do you think?

Read More

 

[DirectDrive]

.375 SOCOM

Make 'er a Man Gun

 

[spookshack]

9mm maybe?

 

[Hueco]

9mm maybe?

Not a 9mm lower so I'd have to use an adapter or something. I've zero experience with those but a 11" 9mm could be fun.

 

[spookshack]

Stern Defense adapters are expensive, but are solid and good to go. Mean Arms makes conversion kits for Pmags….

AimSurplus, LLC

STERN DEFENSE, LLC AR-15 9MM CONVERSION ADAPTER | Brownells

Check out the STERN DEFENSE, LLC available Online at Brownells Today and many more Rifle Caliber Conversion Kits products are available in our Gun Parts Department.

www.brownells.com

 

[TTSX]

Try a .45 ACP AR suppressed if you haven't. That barrel length would still keep things sub sonic, especially with 230s. I built mine with a cmmg RDB system and it's amazing just how quiet it really is with my dead air primal. Granted, you'd need a big bore can so that ads a grand to the build price...


In rifle terms, I'd totally go .375 socom just like directdrive said. I've already got a bunch of .375 bullets for my .375 Ruger. Again, though, I've already established the infrastructure for it.

If you wanted a no hassle drop in, easily sourced choice, I'd go with the "boring" .300 blk with adjustable block like you said. It's not sexy but it's versatile

 

[Nosferatu]

I would probably do something big-bore. .458-whatever-the-favorite-flavor is. I don't keep up with the .223 length stuff much, so can't offer much more than that.

 

[Hueco]

Try a .45 ACP AR suppressed if you haven't. That barrel length would still keep things sub sonic, especially with 230s. I built mine with a cmmg RDB system and it's amazing just how quiet it really is with my dead air primal. Granted, you'd need a big bore can so that ads a grand to the build price...


In rifle terms, I'd totally go .375 socom just like directdrive said. I've already got a bunch of .375 bullets for my .375 Ruger. Again, though, I've already established the infrastructure for it.

If you wanted a no hassle drop in, easily sourced choice, I'd go with the "boring" .300 blk with adjustable block like you said. It's not sexy but it's versatile

I am, rather unfortunately, about 7 months away from a move and then another 12 months after that.

Really wish I would have bought more cans while in Oregon. Unless the ATF can get form 4's cranked out faster, I'll be SOL on picking up another anytime soon.

Would be a lot of fun though. Hadn't considered .45 but if I can get ahold of anything from cmmg - the have a whole host of calibers to potentially play with.

 

[Member 34319]

4" 22lr barrel + 6" 22lr suppressor.

10" of barrel and can - 9.5" rail = 0.5" suppressor poke.

 

[Hueco]

4" 22lr barrel + 6" 22lr suppressor.

10" of barrel and can - 9.5" rail = 0.5" suppressor poke.

Kind of like this one? I suppose I can have a His and Hers build - this did become my wife's favorite so far (taking the top spot from the rainbow spit build)

 

[bradsteen]

Or do an integrally suppressed 9x39 mocked up to look like a VSS Vintorez...

Homemade American VSS Vintorez

We make the Cold War VSS Vintorez at Home with a Liberty Suppressors Leonidas and send fat rounds down range.

www.recoilweb.com

 

[Hueco]

Or do an integrally suppressed 9x39 mocked up to look like a VSS Vintorez...

Homemade American VSS Vintorez

We make the Cold War VSS Vintorez at Home with a Liberty Suppressors Leonidas and send fat rounds down range.

www.recoilweb.com

View attachment 1372217

That is awesome. Had never even thought of doing something like that. I dig it.

 

[kmk1012]

I have a couple 50 Beowulf's that have longer barrels and have considered in the past doing one with a shorter barrel. So, I recommend going BIG with your small AR

 

[solv3nt]

Stern Defense adapters are expensive, but are solid and good to go. Mean Arms makes conversion kits for Pmags….

AimSurplus, LLC

STERN DEFENSE, LLC AR-15 9MM CONVERSION ADAPTER | Brownells

Check out the STERN DEFENSE, LLC available Online at Brownells Today and many more Rifle Caliber Conversion Kits products are available in our Gun Parts Department.

www.brownells.com

I've got one in the mail from optics planet. They are spendy buggers. I'm thinking a 9mm SBR.

 

[GunSmoke]

I bought this set for one of Aero's monthly dealios and am now looking to finish up the build. The hand guard is roughly 9.5" so I'm looking at barrels in the ~10.5 - 12" range.

What I'm having trouble deciding is the caliber. Could do a dedicated .22LR trainer but meh. It's short and loud if I go with 5.56. Little long for .300 subs but would work. Could get an adjustable gas block and go for a jack of all trades .300.

No use cases for this one. It's a fun gun. Whatever it winds up as is how it'll get used.

What do you think?

View attachment 1372032

I did a m4e1 10" 300 blackout and it's my favorite gun. Always suppressed and subs only.

 

[Wombat of Doom]

I say 50 Beowulf

 

[msgriff]

300 HAM'R. Wilson has a 11.3" barrel on sale, ammo is also stocked.

 

[Hueco]

300 HAM'R. Wilson has a 11.3" barrel on sale, ammo is also stocked.

Why 300 hamr over blackout?

 

[Member 34319]

Kind of like this one? I suppose I can have a His and Hers build - this did become my wife's favorite so far (taking the top spot from the rainbow spit build)

View attachment 1372166

That looks like a 9" barrel?

 

[msgriff]

Why 300 hamr over blackout?

300 BO was designed as a subsonic cartridge, the 300 HAM'R was not. Not saying that you can't use the 300 BO for supers. I would not choose the HAM'R for subsonic handloads.