This Picatinny Mount QD Sling Swivel Adapter makes it quick and easy to install a QD mounting point on any Picatinny rail section. The innovative compact, lightweight, rugged mounting base uses max strength Torx drive locking screws to accept any quick detach (QD) sling swivel with 0.37" diameter swivel stud. The adapter It is precision machined from aircraft grade aluminum with a hard-anodizing coating and matte black finish. No gunsmithing required for installation - all tools included. Fits autoloading rifles with Picatinny rails. Does not fit PC Carbine™ Chassis models. Made by UTG Leapers®.