Carbon fiber outer barrels! Custom made by me using 7075 aluminum machined base and tip and custom worked carbon fiber to make the lightest most badass barrels out there, made to the millimeter for optimal fitment. So durable I offer my Badass Guarantee, which ensures you have the mast badass barrel, and if you are dumb enough to break it I'll send you a new one for free. So lightweight that every wimp needs one. A 16" m4 barrel wieghs only 3.5oz! Available in CCW 14mm threaded tip, no threads just a cap, or 14mm CW tip. Most gun carbine models in ANY length are available. Free shipping!