GenIII Round AR15/M16 Free Float Carbon Fiber Forearm, Rifle length, Black finish. The carbon fiber forearm is light weight high strength and also reduces the amount of heat transferred to the shooter during rapid fire.
This Gen III forearm in Black Finish comes with 4 rails, 8.5" rail on top and bottom, 3" rails at 3, and 9 O'clock positions. The forearm is constructed of wrapped carbon fiber, with an aluminum barrel nut and collar. Total length of the forearm is 12.5" and weights 16.5oz. including barrel nut. The clearance from the center line of the barrel to the underside of the forearm is .78". The Inner diameter of the barrel nut is 1.075" Custom barrel nuts with larger ID for larger diameter barrels can be made. Forearm wrench not included.