Precision Reflex Gen 3 Armalite .308 F.F. Forearm Carbon Fiber Flat Dark Earth. The latest PRi Gen III free float forearm carbine length are constructed of light weight high strength carbon fiber aluminum and high strength steel for the best possible combination of weight and strength. The carbon fiber also reduces the amount of heat transferred to the shooters hand during rapid or high volume firing. The forearm comes with 4 rails a 8.5in rail on top and (3) 3in rails at 36 and 9 O'clock positions. Specifications for Precision Reflex Armalite F.F. Forearm: Manufacturer: Precision Reflex Finish: Natural Fabric/Material: Carbon Fiber/Aluminum/Steel Gun Make: Armalite Gun Model: AR-10 Gun Type: Rifle Handguard Length: 9.5 in Handguard Type: Free-Float Gun Rail: Picatinny Gas System Length: Carbine Length Mount Type: Rail Model Generation: 3 Quantity: 1 Package Contents: Precision Reflex Armalite F.F. Forearm Precision Reflex 03-072-01DE: Gen 3 Armalite .308 F.F. Forearm Carbon Fiber Flat Dark Earth