I picked up a 20rd redball magazine but it was a couple of months before I got to try it out. At the range, I loaded it, racked the bolt and it fell out. I reinserted it, making sure it was seated and racked the bolt again. Same thing happened. Redball swapped the mag out but it didn't help. When I called Hipoint, they said that to try taping the center plastic piece down. I had already done that and was told they had received some carbines in for repair with electrical tape near the top of the mags. I put a couple of pieces on the side of the mag opposite the mag catch. Problem solved. Then I decided to zero the irons. When I finally got it on paper, the rear sight was all the way to the left and it was still off by a couple of inches at 25yds. I ended up tilting the front sight. When I got home, I dug through my parts box and came up with a pair of flip up sights and adjusted them to match the red dot. The next trip to the range--all good. The 4595 will never match the range or power of my other long guns, but it's more fun to shoot than any of them.