The Firing Line Forums - View Single Post - Interchangeability of the AR-15

BillM · January 18, 2013, 09:03 PM

The only AR style rifle I know of in the longer calibers are the Cobb MCR's,
and even then there are 4 platform sizes. http://securityarms.com/20010315/gal.../2900/2993.htm

There is a rifle out there that does 223 and 308 on one lower.

Colt LE901. Zero experience with it--just know it exists.

January 18, 2013, 09:03 PM	#8
BillM Senior Member Join Date: January 20, 2009 Location: Amity Oregon Posts: 791	The only AR style rifle I know of in the longer calibers are the Cobb MCR's, and even then there are 4 platform sizes. http://securityarms.com/20010315/gal.../2900/2993.htm There is a rifle out there that does 223 and 308 on one lower. Colt LE901. Zero experience with it--just know it exists.