What caliber can be used with the AR15 lower?
What are all the rounds that can be shot using a standard AR-15 lower receiver. This is a list of all that I know of, I know I am missing a lot.
Copied from the following post in AR Discussion AR Calibers Post
Check in the variants board, this same topic comes up every now and then
32 ACP - Tromix
9mm x 19 - Various
10mm - various
44 Magnum - Tromix (discontinued)
44 AMP - tromix
45 ACP - various
50AE - various
502 Thunder Sabre - various
17 Mach 2
17 Mach IV
5/35 SMc (r)
25 x 223
257 Waterfowler (25 x 204 Ruger)
6 x 45
7 x 45
6 x40 (30 Rem based)
30 HRT (30 x 6.8 SPC x 42)
30 - 223 (30 Coyote)
308 WSSM (30 Olympic)
7.62x24 (Leitner Wise, 10mm based)
7 mm BR
357 Max Rimless
These are all the ones I can remember right now, I am sure I missed some somewhere
Hey, Ed, how about tacking a post about all the various calibers. If I can find some free time, I would even be willing to put together a spreadsheet ....
My guess is all the pistol calibers will use the standard ar lower, but which rifle calibers use the standard ar lower (ex, .308 is too big to fed through the magwell, so a .308 lower is not the standard size).
Where could I find an upper in 7 TCU?
It is one of my favorite Contender cartridges.
he said .308 wssm which means winchester super short mag. Also he forgot the 5.45x39.
All the ones listed in that long laundry list use the standard lower, and most use the standard magazine on top of that. Some require special seating or short bullets, ie the .30-223 will require use of the lighter, shorter bullets to allow use of the standard magazine.
Indeed, I forgot the 5.45x39 .... There are probably a few others I forgot
7 TCU, have an AR smith build one for you. But as with the 30-223, this cartridge will require you to either single load or else use short, stubby bullets seated deep ....
its like this, the 22-250 is too long anything shorter will work, if it'll go down the magwell someone will build it
I was thinking an AR in 5.7x28 along with an FNH five-seven handgun would be an awsome combo.