The GMR-15™ Ultralight has quickly become the favored configuration for USPSA's PCC division and Steel Challenge. Built around our 9mm sleeved ultralight barrel, the competition rig is so super light weight, especially in the muzzle end for lightning-fast transitions. Our Glock-magazine GMR-15™ lower has proven to be the standard to beat for reliability in the PCC world, and now our ultralight models are doing the same for speed and handling.