Home Forums Hunting & Shooting AR and Tactical Rifles What's so @%$# hard about making a 45ACP AR?

I have the JRC in 45 ACP which accepts the G21 mags.
I had problems with it jamming in the beginning.
After two trips back to the manufacture it operates as it should.
Accuracy was always fine, one big hole at 25 yards with a red dot sight.
It`s also available in a 1911 mag version.
The Beretta CX4 Storm is also available in 45 acp, but requires Beretta mags.