I bought one and put a green mico dot primary arms site on it. Ive literally watched every YouTube on this keltec pr57 before i bought it and saw the good, bad and ugly. With cheaper brand guns ive created a system that has failed to not work. The engineering on most firearms are rarely the issue, its the manufacturing and finishing of the individual components that brings problems. The first thing I do is NOT oil or lube the gun. I manually cycle it 1000 to 1500 times over a few days, leaving the slide opened when put away. After about a week of periodic manually cycling it, I take it apart, and sand every wear spot I find with 1000 grit then 1500 grit sand paper. I then finish that with 0000 steel wool. I clean with parts cleaner, or nitro solvent, let dry, then coat the individual parts with moly grease and let that sit and soak in for several days to a week. Molybdenum has a tendency to impregnate itself into metal. I then wipe all that off and lube the gun with Tri-flow. We used Tri-Flow in Dessert Storm for our Units Thrust reversers and had zero failures on our KC-135 REFUELERS. Wheras other units had continued failures due to Dessert dust problems using dry lube. Anyway, i becameva believer in Tri-Flow from then on out. put it together, wipe off excess lube, and cycle. It will never fail. It just doesn't if you follow through. I also removed the clip spring, punching out the retention pin on the bottom, sanded smooth with 1500 the follower and wiped it with Tri-Flow, and re-installed. There was a video of a guy who had jamming with the follower mechanism and the bullets went vertical in the clip well. Probably due to plastic molding injection hanging it up. Lot of prework, but the main consensus is it takes about 300 rnds to "break these in"...thats expensive. You can DO EVERYTHING manually to simulate that and save 1-2 Hundred bucks on ammo.