I know about a dozen guys who own and operate them. Wilson's are basically hand-fitted and are tight as a virgin. They are so tight that I can only measure .0006" clearance between frame and slide. That's right, three zeros. They have never malfunctioned with all the shooting we've done. In fact, I purposely tried to make one jam up by not cleaning it for up to 2400 rds. Only reason I came with 2400 was that I became extremely fatigued and sore after that many rds.