Used 13.7" (16" w/Surefire muzzle device) pistol. Fail Zero BCG, Daniel Defense charging handle, Spike's upper and lower, AR Gold trigger, LAW folding adapter, and probably other upgrades I have forgotten. Used it to try out different upgrades and set-ups, but I am moving back toward stock triggers, for professional reasons. Pistol can be converted to a rifle if the muzzle device is permanently attached, and I can provide a stock to that purpose, if negotiated.