A few weeks back I added a red dot scope to my MKIII target. Me being stupid I did not use lock tite on the base mount screws. Well after about 3 rounds the scope base started to rattle. I took the base off and had the filler plugs in my range bag that came with the gun. I was on a table and somehow one of those little set screws rolled away without me seeing it. I called ruger to buy new ones they sent 3 new stainless ones at NO CHARGE. They also sent me two new magazines when I described a problem to the woman about feeding. She told me it was from using Remington Ammo. I have to give them a thumbs up on their great customer service.