Precision Reflex Gen 3 Armalite .308 Free Float Carbon Fiber Forearm Rifle Length 12.75 in Black. 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 Free Float Carbon Fiber Forearm: Manufacturer: Precision Reflex Gun Make: Armalite Gun Type: Rifle Handguard Type: Free-Float Condition: New Mount Type: Rail Quantity: 1 Package Contents: Precision Reflex Armalite Free Float Carbon Fiber Forearm Precision Reflex 03-072-03B: Gen 3 Armalite .308 Free Float Carbon Fiber Forearm Rifle Length 12.75 in Black