I just received a replacement Discovery from Crosman, the previous one had serious POI problems. Crosman just sent me a new one. While going over it I noticed a gap between the breech and the tube. I haven't had a chance to shoot it yet, if it shoots fine should I just leave it be? Or could the gap cause problems down the road? The gap is pretty big, from the front of the breech all the way back to the transfer port is a gap. What do you think? I am thinking, send it back and get another one.