CMMG Zeroed Polymer Dust Cover Kit Features The CMMG Zeroed Polymer Dust Cover Kit replaces the standard stamped steel ejection port cover with a rigid polymer design that is both lighter and cleaner looking. This polymer construction reduces weight on the upper receiver while still holding up to the dirt debris and recoil impulses an AR-15 experiences in regular use. The kit is built specifically to fit the 5.56x45mm NATO AR-15 platform ensuring proper fit and function on Mil-Spec and compatible receivers. CMMG designed this part to elevate the style of a commonly overlooked component without requiring any special tools to install. Finished in black to blend seamlessly with most AR-15 builds this dust cover kit comes as a complete three piece set ready for installation. At just 0.46 oz and 6.2 inches in length the polymer cover adds negligible weight while giving the rifle a more refined upgraded appearance. CMMG s philosophy of not settling for mil-spec extends to small details like this one letting builders customize their rifle to their own spec. For AR-15 owners looking to upgrade a small but visible part of their build the CMMG Zeroed Polymer Dust Cover Kit is an easy affordable improvement. CMMG Zeroed Polymer Dust Cover Kit Specifications Manufacturer: CMMG Caliber: 5.56x45mm NATO Compatible Hosts: AR-15 Color: Black Material: Polymer Length: 6.2 Weight: 0.46 oz No. of Pieces: 3 Available At: GrabAGun