Genesis Arms Gen-12 12 Gauge Upper for AR-10 Lowers – Video Review

By Graham Baates

U.S.A.–-(Ammoland.com)- Chances are unless you’re an avid AmmoLand reader you’ve never heard of Genesis Arms. A small and innovative company based out of Kellog, Idaho, Genesis Arms has found a way to make a 12-gauge upper and magazine that works with an AR-10 lower. The Gen-12 is not simply another AR-looking shotgun, it’s an upper that slaps onto your AR-10 lower and runs. The bolt catch and magazine release need to be changed in your lower to function ideally, but no functionality is lost with your standard .308 upper.

Take a closer look at the way they made this work in the tabletop video below:

Short-recoiling systems like the one employed by Genesis Arms can have some sensitivity to the weight that is reciprocating. That is to say the weight of the barrel plays a role in how well the gun will cycle given the recoil energy of any particular load. For this reason we opted to do our first range test without any muzzle devices that would add to the weight. A muzzle brake could further complicate …Read the Rest

Source:: AmmoLand