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

AR-15 Rep · September 28, 2008, 10:22 AM

AR lowers can only accept certain calibers to fit in the magwell. I will try to post a pic on www.ar15-kits.com to show them. most of the common calibers are 7.62 X 39, 6.8 SPC, 6.5, 300 whisper, .204 ruger , .223, and 5.56.

September 28, 2008, 10:22 AM	#9
AR-15 Rep Member Join Date: August 29, 2008 Posts: 16	AR lowers can only accept certain calibers to fit in the magwell. I will try to post a pic on www.ar15-kits.com to show them. most of the common calibers are 7.62 X 39, 6.8 SPC, 6.5, 300 whisper, .204 ruger , .223, and 5.56. __________________ www.ar15-kits.com www.lowerreceivers.com www.M-16parts.com