The RA-203 Ripper Upper Receiver's lines perfectly match the Ripper Lower. It includes a Picatinny rail system and is compatible with all AR-15 lower receivers built to MIL-SPEC dimensions. - Key Features - Precision CNC machined from 7075-T6 billet aluminum - MIL-SPEC component compatible - Weight: 8.2 oz. - Forward assist screw included - MIL-A-8625F Type III Class 2 hard anodized flat black finish - Picatinny rail system - Manufactured in RISE Armament�s Oklahoma facility according to strict AS9100 aerospace requirements which are more stringent than standard gun manufacturing requirements - Backed by RISE Armament�s 100% product guarantee and lifetime manufacturing warranty - Designed and made 100% in Broken Arrow Oklahoma U.S.A.