USED Precision Reflex Delta Forearm SPR Straight Top Tactical Rail Rifle Length Gen 3 Black. These Picatinny Rails by Precision Reflex are constructed of T6 6061 hard coat black anodized aluminum for a rugged and lightweight platform that will withstand fire for years to come. The Precision Reflex Gen III Straight Top Rail for Delta Rifle works with the receiver with 3 clamp screws and then there are 3 screws that pass through the forearm and screw into a bar nut on the inside - making it one of the most reliable combos out there. Groove increments are engraved into the rail which allows for the best repeatability and ease of mounting your gun accessories. Equip the Precision Reflex Gen III Delta Tactical Rail Gen 3 to completely customize your rifle build. Specifications for Precision Reflex Delta Forearm SPR Straight Top Tactical Rail: Manufacturer: Precision Reflex Color: Black Finish: Anodized Fabric/Material: T6 6061 Aluminum Gun Rail: Full Top Rail Cant: 0 MOA Gun Make: AR Platform Length: 17.7 in Quantity: 1 Model Generation: 3 Package Contents: Precision Reflex Delta Forearm SPR Straight Top Tactical Rail Precision Reflex 05-071-SPR: Delta Forearm SPR Straight Top Tactical Rail Rifle Length Gen 3 Black