The Firing Line Forums - View Single Post - Building my first custom AR-15....Need Help!!!!!!!!!!!

Slugthrower · September 27, 2008, 05:01 PM

Yes, the AR-10 or Panther LAR receiver will accept the .308 Winchester, 6.5 Creedmore, .260 Remington and .338 rounds. Those rounds are too long for the AR15 reciever.

The AR-15 lower receiver will work with uppers that are chambered in 6.5 Grendel, 6.8 SPC, 204 Ruger, .50 Beowulf, .450 Bushmaster, and a few others. The key has to do with the magazine size that the lower will accept.

AR15.com and M4 are great resources. Be prepared to do alot of reading there. Be aware that some of the different rounds that the AR15 style platform can adapt to may have teething problems that will need working out. The 6.5 Grendel is a nice round to shoot, but it has it's draw backs related to magazines and such.

If you are new to the AR 15 weapon system it may be best to build a 5.56 NATO chambered rifle. The customs calibers and accessories for it may prove frustrating to the novice. Personally, I would rather shoot a proven reliable design than fiddle with a new yet to be proven adaption to a new fad caliber, YMMV.

September 27, 2008, 05:01 PM	#5
Slugthrower Senior Member Join Date: October 22, 2006 Posts: 823	Yes, the AR-10 or Panther LAR receiver will accept the .308 Winchester, 6.5 Creedmore, .260 Remington and .338 rounds. Those rounds are too long for the AR15 reciever. The AR-15 lower receiver will work with uppers that are chambered in 6.5 Grendel, 6.8 SPC, 204 Ruger, .50 Beowulf, .450 Bushmaster, and a few others. The key has to do with the magazine size that the lower will accept. AR15.com and M4 are great resources. Be prepared to do alot of reading there. Be aware that some of the different rounds that the AR15 style platform can adapt to may have teething problems that will need working out. The 6.5 Grendel is a nice round to shoot, but it has it's draw backs related to magazines and such. If you are new to the AR 15 weapon system it may be best to build a 5.56 NATO chambered rifle. The customs calibers and accessories for it may prove frustrating to the novice. Personally, I would rather shoot a proven reliable design than fiddle with a new yet to be proven adaption to a new fad caliber, YMMV. __________________ History is a freak show and a dark comedy. Mankind is a spectacle all to itself. Play your role, let the jesters play theirs. In the end...who has the last laugh?