The PRI Gen II Octagonal carbon Fiber Rifle Length forearm is a combination of a steel nitrite barrel nut, anodized hard coated aluminum and carbon fiber that creates a unique look. The forearm is 12 3/4" in length and has M-LOK slots down the length of the forearm at 12, 3, 6, and 9 O'Clock positions around the forearm. The forearm comes with the same Gen Barrel nut set up with a steel barrel nut, jam collar and a series of set screws to lock every thing down to make a rigid platform. The forearm weighs .7lbs. or 11.2 ounces.