This AR-15 A3 stripped upper is machined from 7075 T6 aluminum billet to mil-spec dimensions, so it pairs with standard mil-spec lowers, barrels and handguards. M4 feed ramps are cut into the receiver for reliable feeding with an M4-pattern barrel extension.

Supplied stripped, it leaves the barrel, bolt carrier group, charging handle and handguard to the builder, and the upper can be built out in any of the calibers the AR-15 platform supports. A hard anodized black finish protects the billet aluminum.

• Model: A3 Stripped Upper Receiver
• Platform: AR-15, Mil-Spec
• Material: 7075 T6 Aluminum Billet
• Feed Ramps: M4
• Finish: Hard Anodized Black
• Part Number: STP.CA15.UPPER.BLK