AR15 Castle Nut - Buffer Tube Lock Ring

It will fit any Mil-Spec or commercial diameter stock mount. This ring mount fits most collapsible butt stocks such as the ATI, Colt , Leapers Utg, most Tapco Inter-fuse, CAA, 223, 556, Ruger SW, and most standard after market shotgun and rifle 4 or 6 position collapsible stocks.Color - BlackMachined notches for staked latch platesMil-Spec to fit all standard applicationsEasy to install with no drilling or tapping required