Rock River Arms A4 9MM UPPER RECEIVER 9MM0350B

Rock River Arms A4 9MM Upper Receiver 9MM0350B Rock River Arms A4 9mm upper receiver complete flat top forged 7075 T6 aluminum black hardcoat 16 inch barrel 1-10 twist A2 flash hider M4 feed ramps last round bolt hold open compatible blowback 9mm AR pistol carbine made USA reliable feeding optics ready railed handguard tactical defensive pistol caliber carbine PCC upgrade precision quality. Rock River Arms 9MM0350B A4 9mm AR Upper A4 Flat Top: Optic oasis. 9mm 16" Barrel: Velocity vibe. 7075 T6 Forged: Tough top. M4 Ramps: Feed flawless. LRBHO: Hold hero. Rock River Arms: Upper unrivaled. RRA 9mm A4 Complete Upper Receiver 9MM0350B Unrivaled— Unrivaled upper. Upper Specs 9MM0350B Spec Details Model A4 9MM Upper Receiver Caliber 9mm Barrel 16" 1-10 Twist Material 7075 T6 Aluminum Rock River Arms AR-9 A4 Upper 9mm Upper— Upper unrivaled. Uses PCC Builds: Soft shooter. Unrivaled Upper: Upper RRA. Elite 9mm: Upper best. 9MM0350B Unrivaled Upper "Rock River Arms A4 9MM UPPER RECEIVER 9MM0350B PCC powerhouse!" powerhouse. "Upper value," victory. 4.9/5. PCC powerhouse. A4 awesome. Rock River Arms A4 9MM Upper Receiver: 9MM0350B. The End