CMMG Ejection Port Cover Kit – AR-15/M16

The CMMG Ejection Port Cover Kit provides a complete replacement dust cover assembly for AR-15 and M16 platform rifles. This component seals the ejection port when the rifle is not in use, keeping dust, dirt, and debris out of the upper receiver and protecting the bolt carrier group. Whether you're replacing a damaged cover or building a new upper receiver, this kit includes everything needed for installation.

Machined from durable steel with a black oxide finish, the cover is designed to withstand repeated opening and closing cycles. Installation requires basic tools and familiarity with AR-15 disassembly—the C-clip and rod must be properly seated to ensure the cover pivots smoothly and stays closed under recoil. All necessary components including the cover, rod, and spring are included.

• Part Type: Ejection Port Cover Assembly
• Compatible Firearms: AR-15, M16, and mil-spec AR platform rifles
• Material: Steel
• Finish: Black Oxide
• Installation: Drop-In (requires basic disassembly)
• Includes: Dust cover, hinge rod, spring, C-clip