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

glockcompact · January 18, 2013, 08:25 PM

Thats correct. The AR-10 is based off of the 308 and the ar-15 is based off of the 5.56/223. Two different legnths of actions. The 5.56/223 and others that fit the ar-15 are considered a micro length or supershort action. The 308 is considered a short/standard action. It has to have a longer bolt throw to eject the brass.

January 18, 2013, 08:25 PM	#6
glockcompact Senior Member Join Date: December 22, 2010 Location: Colorado, United States of America Posts: 396	Thats correct. The AR-10 is based off of the 308 and the ar-15 is based off of the 5.56/223. Two different legnths of actions. The 5.56/223 and others that fit the ar-15 are considered a micro length or supershort action. The 308 is considered a short/standard action. It has to have a longer bolt throw to eject the brass. __________________ Look I like glocks. I've owned Sig's, HK's, 1911's, S&W, and other fine pistols but Glocks have been a favorite for me. Handguns without safeties are not dangerous. Idiots are dangerous.