AR-15 Pistol Buffer Tube Complete Assembly (PBT-CA)™ by Phase 5 Weapon Systems Inc partners our enhanced buffer spring, billet aluminum Pistol buffer tube, Mil-Spec end plate, Mil-Spec castle nut, Mil-spec carbine buffer and our ultra-durable NPVC-constructed buffer tube foam pad. The lower slot is machined to accept all Mil-Spec end plates and sling mounting accessories.
Overall diameter: 1.25”
Works great with the Sig Sauer® Pistol Stabilizing Brace! Nice snug fit to insure no unwanted brace movement during pistol operation. Also allowing any desired brace position with zero restrictions, all the way forward, or as far back on the tube as you would like.