Brownells Ejection Port Cover Spring Features The Brownells Ejection Port Cover Spring restores proper mil-spec tension to the AR-15 dust cover ensuring it snaps closed reliably after being opened by the charging handle or bolt carrier group. Over time and repeated cycling factory springs can weaken leaving the dust cover loose or unable to stay shut which allows dirt and moisture into the action. This replacement spring is manufactured to mil-spec dimensions so it is a straightforward no-fitting-required swap for the factory part. A non-reflective black finish matches typical AR-15 components and resists glare in field use. Made from steel for durability the spring is built to withstand the repeated flexing and compression it experiences every time the dust cover opens and closes. Because it is manufactured entirely in the USA shooters can expect consistent dimensional accuracy that matches mil-spec ejection port covers across AR-15 builds. Replacing a worn dust cover spring is a quick maintenance task that most owners can complete at home with basic tools. This small but important part helps keep the rifle s action protected from contamination between range trips or storage periods. Brownells Specifications Brand: Brownells Type: Ejection Port Cover Spring Compatible Hosts: AR-15 Material: Steel Finish: Non-Reflective Black Available At: GrabAGun