I harped on Wilson a few weeks ago, when the issue wasn't their fault, and wanted to appologize for blaming them for something I caused. I have a Kimber UCII that would lock open with ammo in the mag, and Wilson Mags did help the frequency of the occurance, but still had a Pre lock, every 100 rounds or so. Well to get to the point.....I sent the mags back to Wilson Combat, along with a note of what caused the damage to the followers, and they did not warranty the damaged followers, but I didn't expect them to. I did pick up a few extra followers in case the new ones start chewing up again. The slide stop I am now running has more meat on it to catch the follower, and haven't had an early lock back, or a no hold open issue on empty, in 300 rounds. The actual culprit that ruined the followers was a small dimple in the slide stop face, that engages the plunger. I tried that to help with the early lock back, but the magazine spring-followers, couldn't overcome the resistance the dimple caused, and the followers just pushed pass the stop. Me slapping the empty mags into the pistol, and pulling the slide back to hold open without success, over and over, did them plastic followers no good