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Centerfire Rifles - Semiautomatic or Gas Operated Centerfire rifles, carbines and other gas operated rifles.

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  #1  
Old 09-01-2010, 7:27 AM
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Default Here's a list of AR-15 Calibers...WOW!!!

I was searching for what caliber options there were for AR-15's and came across this list...impressive. Anyone have some to add to the list, or add a similar list for AR-10 lower?

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

This list is in no way complete.

This list does not include complete different uppers like the FN 5.7 or the one that shoots .410 shotgun, crossbow bolts or bolt action uppers like the 50BMG

(credit to melensdad from oa2.org for the list)
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  #2  
Old 09-01-2010, 7:30 AM
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Hmm...I think there might be some .450's that I missed.
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  #3  
Old 09-01-2010, 7:57 AM
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Yeah but i bet most of those calibers are very rare and not popular enough for mass production. some are great for mass production
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  #4  
Old 09-01-2010, 8:11 AM
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So far I have AR's in 5.56/.223 and 7.62x39. Trying to figure out what will be next. The 243 wssm might be fun, the 55gr rounds in that caliber have a crazy flat trajectory. But then a nice house clearing round like the .458 socom sounds fun too. So many options.

http://ballisticscalculator.winchester.com/

Last edited by Bogart; 09-01-2010 at 8:18 AM..
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  #5  
Old 09-01-2010, 8:12 AM
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Quote:
Originally Posted by Bogart View Post
I was searching for what caliber options there were for AR-15's and came across this list...impressive. Anyone have some to add to the list, or add a similar list for AR-10 lower?

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

This list is in no way complete.

This list does not include complete different uppers like the FN 5.7 or the one that shoots .410 shotgun, crossbow bolts or bolt action uppers like the 50BMG

(credit to melensdad from oa2.org for the list)
You gotta be kidding me right?!

LOL. cool list.
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  #6  
Old 09-01-2010, 8:38 AM
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.50 Beowulf
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  #7  
Old 09-01-2010, 8:47 AM
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Yeah, there are still many many people who think .223 and 5.56 are the same.

I'd add 5.56 on its own.

Great list none the less. I am impressed


Is Wylde a chamber size /style or bullet size /style?

Last edited by dieselpower; 09-01-2010 at 8:51 AM..
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  #8  
Old 09-01-2010, 10:44 AM
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Quote:
Originally Posted by dieselpower View Post
Is Wylde a chamber size /style or bullet size /style?
Chamber.
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  #9  
Old 09-01-2010, 12:09 PM
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Good info here, TAG!
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  #10  
Old 09-01-2010, 12:23 PM
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.450 Bushmaster
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  #11  
Old 09-01-2010, 2:42 PM
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Quote:
Originally Posted by dieselpower View Post
Yeah, there are still many many people who think .223 and 5.56 are the same.

I'd add 5.56 on its own.
The cartridge case dimensions are the same, therefore the chambers of either one will fit the other ammo.

If you want to get so picky as to differenciate between 223 and 5.56, you should really keep track of the 10+ variations of 223/5.56 chambers...

www.ar15barrels.com/data/223-556.pdf
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  #12  
Old 10-12-2014, 10:34 AM
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Question .300 calibers, Confusing

You mentioned a 300 Wisper which I never heard about. But I know of a 300 AAC and a 300 Blackout. Are they all one in the same or different? I've seen 300 AAC complete uppers for sale as well as ammo, but neither of the other two in either form. What's up doc?
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  #13  
Old 10-12-2014, 10:40 AM
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Quote:
Originally Posted by Bogart View Post
So far I have AR's in 5.56/.223 and 7.62x39. Trying to figure out what will be next... (snip)
I have the same. I'd think .308 comes next.
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Old 10-12-2014, 10:47 AM
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Well. Time for some more uppers!
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  #15  
Old 10-12-2014, 10:48 AM
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This list is doesn't include many cartridges that have been used on AR15s. I can think of a long list of bolt action uppers chambered in everything from .308 win, 30-06, etc. up to and including 50BMG.

Quote:
Originally Posted by JerryQuill View Post
You mentioned a 300 Wisper which I never heard about. But I know of a 300 AAC and a 300 Blackout. Are they all one in the same or different? I've seen 300 AAC complete uppers for sale as well as ammo, but neither of the other two in either form. What's up doc?
You just bumped a thread from 2010. 300 AAC BLACKOUT was approved by SAAMI on January 17, 2011. BTW, welcome to the forum.
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  #16  
Old 10-12-2014, 10:59 AM
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Quote:
Originally Posted by JerryQuill View Post
You mentioned a 300 Wisper which I never heard about. But I know of a 300 AAC and a 300 Blackout. Are they all one in the same or different? I've seen 300 AAC complete uppers for sale as well as ammo, but neither of the other two in either form. What's up doc?
300 blackout/aac is the commercialized version of 300 whisper.
Both of those use a 1.350" trim length.
There are also variations of 300x221 that use a 1.400" trim length.
The short trim length ammo can be used in any chamber.
The longer trim length ammo can only be used in the longer chambers.
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  #17  
Old 10-12-2014, 12:00 PM
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I don't believe 7.62x25 uses a gas system, I'd expect it to be blowback.
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Old 10-12-2014, 2:01 PM
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You want a ton more calibers go check sskindustries.com that's where J.D. Jones does his JDJ cartridge thing and he's the father of the Whisper rounds (300 Whisper, 338 Whisper and so on).
He's also the guy that made the .950 JDJ out of a shortened 20mm antiaircraft round.
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Old 10-12-2014, 2:29 PM
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Hmmm, I'm set on .22LR, .223, 7.62x39, 9mm Lugar and .50 Beo.... May need just one more... I'm thinking 6.5mm Grendel.
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Old 10-12-2014, 2:41 PM
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What, No 457 Henway?

;-)
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  #21  
Old 10-12-2014, 2:41 PM
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Default Some more cartridges

With existing bolt:
6.5mm PCC

Altered design bolt:
17 WSM (Franklin Armory mfr w/DI operating system)
6mm AR (6.5 Grendel parent case)
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Old 10-13-2014, 7:49 AM
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Where do you get bolts and mags for all those obscure calibers?
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Old 10-13-2014, 8:40 AM
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The possibilities are endless's
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Old 10-13-2014, 9:24 AM
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Quote:
Originally Posted by Jimi Jah View Post
Where do you get bolts and mags for all those obscure calibers?
They are off-the-shelf bolts and mags.
The barrel is the harder part to get.

There are factory bolts for 6.8spc (0.420"), 7.62x39 (0.440") and 458 socom (0.473") that are used for any of the cartridges larger than a 223/5.56 (0.380").
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Old 10-13-2014, 9:43 AM
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I'd love to see a simi auto 30.06 AR platform rifle.
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Old 10-13-2014, 9:51 AM
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Quote:
Originally Posted by morfeeis View Post
I'd love to see a simi auto 30.06 AR platform rifle.
All it should take is a barrel, a smaller bolt and some magazine work and one of these could be turned into a 30-06:
http://nemoarms.com/portfolio/omen-m.../gallery/guns/
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Old 10-13-2014, 8:54 PM
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I don't agree with the separation of calibers by bolt modification. What ever that means. The AR-15 is a caliber neutral platform. It does not imply caliber. Barrels and bolts and mags change with calibers its part of the AR-15. A 6.8SPC and a 6.5 Grendel is just as much an AR-15 as a 5.56 even though they don't use a 5.56 bolt they use a caliber specific bolt same as the 5.56 uses a caliber specific bolt. You also missed lots of calibers. 450 bushmaster, 270AR, 375 Reaper, 6mm ARP, 277 wolverine just to name a few.

Last edited by Xcountryrider; 10-13-2014 at 9:10 PM..
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Old 10-13-2014, 9:03 PM
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Quote:
Originally Posted by morfeeis View Post
I'd love to see a simi auto 30.06 AR platform rifle.
What about The noreen BN36
http://www.onlylongrange.com/bn36.asp
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  #29  
Old 10-13-2014, 9:04 PM
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Dont forget the LWRC .499 platform.
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Old 10-13-2014, 9:06 PM
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Quote:
Originally Posted by morfeeis View Post
I'd love to see a simi auto 30.06 AR platform rifle.
Like the Noreen 30-06 AR?

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  #31  
Old 10-13-2014, 9:14 PM
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Ar-10 chamberings

.243 Winchester
.22-250
.257 Roberts
.260 Remington
6mm Creedmoor
6.5 Creedmoor
6.5 WSM
.270 WSM
7mm WSM
7mm-08 Remington
.284 Winchester
.300 WSM
.300 SAUM
.300 Savage
.325 WSM
.338-7mm Benchrest
.338 Whisper
.338 Federal
.338 RCM
.35 Remington
.358 Winchester
.358 HDH (WSSM)
.450 Marlin
.500 Phantom (this one may have died on the vine)

Last edited by Topflight80; 10-14-2014 at 3:49 PM..
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Old 10-13-2014, 9:16 PM
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Quote:
Originally Posted by CSACANNONEER View Post
This list is doesn't include many cartridges that have been used on AR15s. I can think of a long list of bolt action uppers chambered in everything from .308 win, 30-06, etc. up to and including 50BMG.
Those calibers you listed have never been used in an AR-15.
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Old 10-13-2014, 9:18 PM
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Quote:
Originally Posted by Topflight80 View Post
Ar-10 uncommon chamberings

.243 Winchester
.22-250
.257 Roberts
.260 Remington
6mm Creedmoor
6.5 Creedmoor
6.5 WSM
.270 WSM
7mm WSM
7mm-08 Remington
.284 Winchester
.300 WSM
.300 SAUM
.300 Savage
.325 WSM
.338-7mm Benchrest
.338 Whisper
.338 Federal
.338 RCM
.35 Remington
.358 Winchester
.358 HDH (WSSM)
.450 Marlin
.500 Phantom (this one may have died on the vine)
Remington chambers the R-25 in 7mm08 and 243. That makes them pretty common.
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Old 10-13-2014, 9:28 PM
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Quote:
Originally Posted by Jimi Jah View Post
Where do you get bolts and mags for all those obscure calibers?
It would help if you named the calibers you think are "obscure". Usually bolts come with the barrels. I get extra Grendel bolts from Maxim Firearms but they also carry 6.8SPC and 7.62X39. http://www.maximfirearms.com/online-...olts-carriers/

Then there Texas Undergound Tactical
http://www.undergroundtactical.com/c...rts/upper.html

I got my 270AR bolt with the barrel from AR Performance.
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  #35  
Old 10-13-2014, 9:28 PM
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Quote:
Originally Posted by Xcountryrider View Post
Those calibers you listed have never been used in an AR-15.
FAIL
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Old 10-13-2014, 9:34 PM
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FAIL
Show me an AR-15 that has ever chambered a 308WIN? Bullets are to big for the magwel my friend.
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Old 10-13-2014, 9:39 PM
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Quote:
Originally Posted by Xcountryrider View Post
Show me an AR-15 that has ever chambered a 308WIN? Bullets are to big for the magwel my friend.
He said bolt action uppers.

Last edited by Topflight80; 10-13-2014 at 10:42 PM..
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  #38  
Old 10-13-2014, 11:03 PM
ucfmcdonald ucfmcdonald is offline
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Great list none the less. I am impressed
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  #39  
Old 10-14-2014, 12:03 AM
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Cheezle56 Cheezle56 is offline
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Quote:
Originally Posted by Topflight80 View Post
Ar-10 chamberings

.243 Winchester
.22-250
.257 Roberts
.260 Remington
6mm Creedmoor
6.5 Creedmoor
6.5 WSM
.270 WSM
7mm WSM
7mm-08 Remington
.284 Winchester
.300 WSM
.300 SAUM
.300 Savage
.325 WSM
.338-7mm Benchrest
.338 Whisper
.338 Federal
.338 RCM
.35 Remington
.358 Winchester
.358 HDH (WSSM)
.450 Marlin
.500 Phantom (this one may have died on the vine)
I think I heard there is a 12 gauge upper in the works somewhere. I know 12ga will fit through a magwell with room to spare
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  #40  
Old 10-14-2014, 12:13 AM
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CRTguns CRTguns is offline
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Quote:
Originally Posted by Bogart View Post
...

AR-15 using a simple blowback operation
.17 HMR
.22 WMR
...these are iffy at best
30 Carbine...Noooot in blowback.
357 Sig...simple blowback for this needs 30 ounces of bolt+buffer
400 Cor-Bon........will be worse than 357 sig.
41 Action Express..... and even worse.
10mm Auto ......still no.
45 Super .......nope
45 Win Mag.......nay coz.

(credit to melensdad from oa2.org for the list)
Those could be made to work... Ive done .357 sig builds for customers, but to keep it safe you really need more than 30 ounces of mass to delay the blowback. I don't even want to do the math for the 400 corbon or 41 AE.

Years back HK determined that a .308 could run in simple blowback also... with a 26 pound bolt. I'm guessing the 45 winmag would require around 4-5 pounds of bolt. The 400 corbon should be even more.

Bottleneck cases can be operated with gas... .30 carb uppers that use DI are out there. Same for 7.62x25 Tok. Even a 9mm can run on a locked breach gas op gun.

and cannot forget Franklin Armory's .17 rimfire that uses an Osprey Piston and a locked breech.

Last edited by CRTguns; 10-14-2014 at 12:15 AM..
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