Where the design steps away from the traditional AR-15 form is that the recoil spring is contained within the bolt-carrier group inside the receiver. This allows for a more compact design and ...

The AR-15 rifle uses a thinner .223 caliber bullet than the 9mm handgun. So when you look at a target, the 9mm hole is wider. Kindred said the 9mm will only go through one target, whereas the ...