Precision Reflex Carbon Fiber Forearm Gen 3 DPMS .308 15.75 in Flat Dark Earth. The length is 14.75in from forearm collar to the end of the tube. The latest PRi Gen III free float forearm 14.75in 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. Natural Finish. The ID is 1.9in and the OD is 2.165in. The weight of the forearm with barrel nut is 1.16 pounds. Center line of the tube to the top of the rail is 1.328in. Specifications for Precision Reflex DPMS Carbon Fiber Forearm: Manufacturer: Precision Reflex Fabric/Material: Carbon Fiber Gun Make: DPMS Gun Model: DPMS LR-308 Gun Type: Rifle Gun Rail: Picatinny Condition: New Mount Type: Rail Quantity: 1 Features of Precision Reflex 14 inch GenIII DPMS .308 Carbon Fiber Forearm: Gen III DPMS 308 14" Free float Forearm The overall length is 14.75" from forearm collar to the end of the tube The latest PRi Gen III free float forearm is 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 8.5" rail on top and (3) 3" rails at 36 and 9 O'clock positions The ID of the aluminum collar on the end of the tube is 1.9" with the OD 2.170" The weight of the forearm is 19 ounces or 1.19 lbs. Package Contents: Precision Reflex DPMS Carbon Fiber Forearm Precision Reflex 03-072-1415DE: Carbon Fiber Forearm Gen 3 DPMS .308 15.75 in Flat Dark Earth