The CMMG Ejection Port Cover Kit (22BA627) is an ejection port dust cover designed to work with CMMG 9mm uppers and conversion kits, including a port cover, rod, spring, and gas/brass deflector. This kit features a black finish and delivers the reliable quality CMMG is known for.
The port cover allows for a compact solution on the AR platform for smaller calibers, while the included deflector sits to the rear of the port to assist in deflecting spent brass and direct gases from firing. The cover fits both forged and billet upper receivers, making it compatible with most standard AR-15 upper assemblies. Users report perfect fit and finish on standard mil-spec AR-15 uppers and recommend it for any pistol caliber build.
Installation is straightforward with the included components, though CMMG recommends that all CMMG parts be installed by a qualified and trained gunsmith. this ejection port cover kit offers practical functionality and a clean, finished appearance at the ejection port.
