Originally Posted by
Maxwell Smart
Some of the AIA MK4's have a heavy barrel similar to the B2's.
The AIA magazine is more-or-less a shortened M-14 magazine; different in that there is no small square hole in the front wall of the AIA mag. I would imagine that this would mean that the AIA mag would not fit an M-14 or M1A. The square block on the back of the two magazines also looks to be slightly different; suspect that an M-14 mag would need some minor fettling to fit in an AIA. The extra magazine spring force in the 20 round magazine could also make operating the AIA bolt quite stiff.