Well, I purchased it new 2 days ago and just had my first chance to fire it. It failed. About 50rds in, the rear frame pin, the pin that hold all the innards in place, walked out. I pressed it back in and every 20 or so rounds fired, it walks back out again. 100rds, mix of Tula, Federal bulk, Winchester bulk, Winchester Silvertips and Federal 9bple all functioned 100%. However, the gun is useless in its current state. Looks like I'm gonna have to ship it back to Sig Monday. I'm disappointed, but not surprised. Sig q/c has been abysmal of late. Pics for reference. There is absolutely nothing inside the pin hole that holds the pin in place, even though the pin appears to be grooved for some type of keeper.