I maintain several for a local small police department thst uses them as a patrol carbine. The only issue I had was that a couple had to have the sights adjusted pretty close to the limit to zero. This department also tried to use a cheap "Tiawan tactical" laser... Fail, but no fault of the guns. They stand up to the abuse of a cop car trunk fine, but the way they do it, they don't fold the guns. They keep them unfolded in a regular gun case.