Sorry to revive an old thread. I just bought the 45 acp JR carbine and I'm having the same ejection problems mentioned earlier. I had approx 6 fte out of 26 rounds fired. I already knew that the glock mag could be a problem so when I got home I fixed the spring so it is aligned straight and also putting more pressure on the rear of the follower. My specific question is: Does anyone know what causes the brass to eject slowly? If so, what is the fix? My brass was falling out right next to the receiver. I shot Winchester 230 rn and some gold dot 230 hp. I don't feel it is an ammo issue. Thanks.