AR-15 Pistol Buffer Tube (PBT) by Phase 5 Weapon Systems Inc features our billet aluminum buffer tube, foam pad constructed of ultra-durable nitrile rubber, plus Mil-Spec end plate and castle nut. Buffer tube is compatible with Mil-Spec carbine buffer and spring, and 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 designed to fit Mil-Spec carbine buffer and spring

Machined lower slot
-Slot offers maximum compatibility by accepting all Mil-Spec end plates and sling mounting accessories.

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.