San Tan Tactical STT PILLAR Billet AR-15 Upper Receiver Black

The San Tan Tactical STT PILLAR Billet is an AR-15 upper receiver machined from a single billet of 7075-T651 aluminum. It is designed to mate with standard AR-15 lower receivers and is chambered for 5.56x45mm NATO and .223 Remington ammunition.

The receiver is CNC machined from a single piece of aerospace-grade 7075-T651 aluminum, with CAD modeling used to remove material from areas where it serves no structural purpose, such as the forward assist block and the shell deflector. The finished upper weighs 8.2 ounces. The finish is black.

Features include M4 feed ramps, a shell deflector, and a milspec ejection port cover.

• Type: AR-15 upper receiver
• Material: 7075-T651 aluminum
• Caliber: 5.56x45mm NATO, .223 Remington
• Fits: AR-15 lower receivers
• Weight: 8.2 oz
• Color: Black
• Features: M4 feed ramps, shell deflector, milspec ejection port cover