This AR-15 Pistol Buffer Tube Complete Assembly by Phase 5 partners an enhanced buffer spring, billet aluminum
Pistol buffer tube, Mil-Spec end plate, Mil-Spec castle nut, Mil-spec
carbine buffer and ultra-durable NPVC-constructed buffer tube foam
The lower slot is machined to accept all Mil-Spec end plates and
sling mounting accessories.
Overall diameter: 1.25”