DetailsOut Of Stock Phase 5 Pistol Buffer Tube $64.99 AR-15 PISTOL BUFFER TUBE COMPLETE ASSEMBLY (PBT-CA) AR-15 Phase 5 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” CNC-MACHINED 7075 T651 CERTIFIED US MADE BILLET ALUMINUM BUFFER TUBE Tube is designed to fit Mil-Spec carbine buffer and spring. HARD-ANODIZED MIL-SPEC TYPE III BLACK FINISH Classic Military anodized finish adds durability and visual appeal that ensures reliability against component wear. MACHINED LOWER SLOT Slot offers maximum compatibility by accepting all Mil-Spec end plates and sling mounting accessories.