San Tan Tactical STTBBPILLAR1 STT-15 Big Bore Pillar Upper Multi-Caliber 7075-T6 Aluminum Black Anodized Receiver for AR-15

The STT Big Bore Pillar upper receiver weighs in at 8.2 oz. It has a truss design that acts similar to a bridge that carries and distributes the stress across the entire platform verses putting all of the stress on the material right behind the threads of the receiver. The extra strength gained from this design is not only to help the receiver, but it also in turn helps improve your accuracy. NOTE: Requires forward assist, charging handle, barrel, handguard, gas block, muzzle brake, gas tube and BCG (Bolt Carrier Group) to complete.

Type : Semi-Complete
Caliber : Multi-Caliber
Sights : None, Optic Ready
Receiver Finish : Black Anodized