AR Calibers..

mjn

Jan 2009
394
1
Tri-Cities, Wa
Other than the 223/5.56, what are some of the other calibers (uppers) one can put on an AR lower?
I know the obvious stuff.. 50 BMG (single shot), 9mm, 45acp, .22LR, 50 Beowolf.. anything else worth looking at?

I really wish you could chamber the AR15 in 308....
 
Jan 2009
1,684
0
s. greenlake *****
AR-15, without bolt modification
.17 Remington
.17/223
.20 Tactical
.20 Practical
.20 Vartag
.204 Ruger
.221 Fireball
.222 Remington
.222 Remington Magnum
.223 Remington (5.56x45mm)
.223 Remington Ackley Improved
6x45mm
6mm TCU
6x47mm
6mm Whisper
.25x45mm
6.5mm Whisper
7mm Whisper
7mm TCU
.300 Whisper (.300/221, .300 Fireball)
.338 Whisper

AR-15, with bolt modification
223 WSSM
5.45x39mm (.21 Genghis)
243 WSSM
6mm PPC
6mm WOA
6mm BR Remington
6mm Hagar
6.5mm PPC
6.5 WSSM
6.5 WOA
6.5mm Grendel
25 WSSM
6.8x43mm SPC
.30 Herrett Rimless Tactical (6.8x43mm case trimmed to 41mm and necked up to .308; the 6.8mm version of the .300 Whisper)
7.62x25
7.62x39mm
.30 RAR
300 OSSM
.357 Auto
.35 Gremlin (necked up 6.5 Grendel to 358)
.358 WSSM (various names, but all are some form of a WSSM necked up to 35 caliber, some are shortened to make them big game legal in Indiana)
.458 SOCOM
.50 Action Express
.50 Beowulf

AR-15 using a simple blowback operation
.17 HMR
.22 LR
.22 WMR
9x19mm
9x21
9x23
30 Carbine
357 Sig
40S&W
400 Cor-Bon
41 Action Express
10mm Auto
45 GAP
45ACP
45 Super
45 Win Mag
 
Jan 2009
845
0
Renton, WA
AR-15, without bolt modification
.17 Remington
.17/223
.20 Tactical
.20 Practical
.20 Vartag
.204 Ruger
.221 Fireball
.222 Remington
.222 Remington Magnum
.223 Remington (5.56x45mm)
.223 Remington Ackley Improved
6x45mm
6mm TCU
6x47mm
6mm Whisper
.25x45mm
6.5mm Whisper
7mm Whisper
7mm TCU
.300 Whisper (.300/221, .300 Fireball)
.338 Whisper

AR-15, with bolt modification
223 WSSM
5.45x39mm (.21 Genghis)
243 WSSM
6mm PPC
6mm WOA
6mm BR Remington
6mm Hagar
6.5mm PPC
6.5 WSSM
6.5 WOA
6.5mm Grendel
25 WSSM
6.8x43mm SPC
.30 Herrett Rimless Tactical (6.8x43mm case trimmed to 41mm and necked up to .308; the 6.8mm version of the .300 Whisper)
7.62x25
7.62x39mm
.30 RAR
300 OSSM
.357 Auto
.35 Gremlin (necked up 6.5 Grendel to 358)
.358 WSSM (various names, but all are some form of a WSSM necked up to 35 caliber, some are shortened to make them big game legal in Indiana)
.458 SOCOM
.50 Action Express
.50 Beowulf

AR-15 using a simple blowback operation
.17 HMR
.22 LR
.22 WMR
9x19mm
9x21
9x23
30 Carbine
357 Sig
40S&W
400 Cor-Bon
41 Action Express
10mm Auto
45 GAP
45ACP
45 Super
45 Win Mag

Jeez, you put up all that good info, but NOT the caliber the OP asked about, .308/7.62x51? :thefinger:

And.... here's some .308 AR gun porn to show that yes Virginia, there is a .308 AR!

ultimate-sniper.jpg
 
Jan 2009
1,684
0
s. greenlake *****
Jeez, you put up all that good info, but NOT the caliber the OP asked about, .308/7.62x51? :thefinger:

And.... here's some .308 AR gun porn to show that yes Virginia, there is a .308 AR!



Thats cause you can't convert the AR platform to .308!! DUH.
I demand details for the pic your showing!!!!!!

:motz:

Can you put that upper on any AR lower?
Is there a special mag?
Who made it? etc etc
 
Jan 2009
845
0
Renton, WA
Thats cause you can't convert the AR platform to .308!! DUH.
I demand details for the pic your showing!!!!!!

:motz:

Can you put that upper on any AR lower?
Is there a special mag?
Who made it? etc etc

Les Baer Custom Inc. MONOLITH .308 Semi-Auto
SWAT Model


No... my bad on that part, dedicated lower... big ass .308 rounds and all.

Takes Magpul Pmags. Pretty sure it's this one for $20

PMAG® MAGAZINES - PMAG® 20LR, 7.62x51 Magazine – SR25/M110

Les Baer! Pretty much my dream .308 AR :rock:
 

mjn

Jan 2009
394
1
Tri-Cities, Wa
**** Pete.... you had me all fired up there for a second...

I already have the lower.. I just wondered what other (viable) cartridge there was out there that one could use..

I guess considering ammo availability, I'll stick with 223/5.56 for this one.

I'll just have to get that AR10 one of these days....
 
Jan 2011
69
0
Grandview, WA
AR Calibers - AAC 300 Blackout

Also known as the 300 Whisper. I wanted an AR 15, but I also wanted a 30 cal.
Not having any idea what I was doing, I bought an AR lower. It just happened to be made by AAC . I started doing some research and found the AAC lower could accommodate 223/5.56 and also a 30 cal called the 300 Blackout. The same lower, the same magazines, same bolt, just change the uppers. I now have two uppers for my lower and love the idea. The 300 BO has very little recoil and lower noise level than the 223. It's illegal to big game hunt with a 223 in WA so I'll hang my 300 BO on the lower and use it. I only have one set of iron sights, so I put them on the 300 and used a laser cartridge to align them. Hope to get to the range next week and check my zero at 50 and then 100 yards. If the scope mounts come in I'll take the 5.56 upper along and shoot it too.
 
Top