I bought what looked like a nice green bore laser off E Bay a few weeks ago. Even though the 4595 was shooting well, I decided to check and see if my scope was holding 0. Put the laser in the end of the barrel. My scope was over 25 clicks left and high. Hmm. reset to the green dot. Went to the range and wasn't even on paper at 50 yards. WTH. I bought a bolt .223 and was putting that laser in the barrel, I noticed the the green dot was doing circles on the ceiling. When I checked it, the beam wasn't centered in the device. Well it's now a good toy for a cat to play with. I bought 2 new lasers that go in the chamber. Everything back to 0 and the range will tell. Not everything you buy is of good quality, Obviously