CMMG120918456
CMMG Resolute Mk3 .308 Win 16.1" Rifle - Armor Black$1,787.77
Availability: In Stock
The CMMG Mk3 .308 Win Ejection Port Cover Kit keeps dust, debris, and moisture out of your AR-10 upper receiver when you're not shooting. Whether you're between range sessions, storing your rifle long-term, or running drills in dusty terrain, a quality ejection port cover is one of those small details that pays dividends in reliability and maintenance. This CMMG kit bundles everything you need—the cover itself plus the rod and spring hardware—so you're not hunting through bins for hard-to-source components.
AR-platform shooters know that neglecting small protective measures can lead to fouling and corrosion over time. A covered ejection port prevents sand, rain, and grime from working their way into your action, which is especially valuable if you're running your .308 in less-than-ideal conditions or storing it for extended periods. CMMG engineered this kit to fit the Mk3 platform, so installation is straightforward on a compatible receiver.
Built to Bosque standards—no frills, just functional black finish that matches most AR-10 uppers. If you've already got a stripped receiver waiting for final touches, or you're upgrading an existing build, this is the kind of accessory that should be in your parts box.
This kit is designed for the CMMG Mk3 .308 Win platform. Verify your upper receiver is compatible with CMMG Mk3 specifications before ordering.
The kit includes the ejection port cover, the rod, and the spring—all the hardware needed to install the cover on a compatible receiver.
The kit contains all the components listed. Refer to CMMG documentation or your rifle's manual for installation guidance specific to your platform.
SKU: 115674254 • Width: 3.2in • Height: 0.5in • Depth: 4.7in • Weight: 0.06oz
Availability: In Stock
The CMMG Mk3 .308 Win Ejection Port Cover Kit keeps dust, debris, and moisture out of your AR-10 upper receiver when you're not shooting. Whether you're between range sessions, storing your rifle long-term, or running drills in dusty terrain, a quality ejection port cover is one of those small details that pays dividends in reliability and maintenance. This CMMG kit bundles everything you need—the cover itself plus the rod and spring hardware—so you're not hunting through bins for hard-to-source components.
AR-platform shooters know that neglecting small protective measures can lead to fouling and corrosion over time. A covered ejection port prevents sand, rain, and grime from working their way into your action, which is especially valuable if you're running your .308 in less-than-ideal conditions or storing it for extended periods. CMMG engineered this kit to fit the Mk3 platform, so installation is straightforward on a compatible receiver.
Built to Bosque standards—no frills, just functional black finish that matches most AR-10 uppers. If you've already got a stripped receiver waiting for final touches, or you're upgrading an existing build, this is the kind of accessory that should be in your parts box.
This kit is designed for the CMMG Mk3 .308 Win platform. Verify your upper receiver is compatible with CMMG Mk3 specifications before ordering.
The kit includes the ejection port cover, the rod, and the spring—all the hardware needed to install the cover on a compatible receiver.
The kit contains all the components listed. Refer to CMMG documentation or your rifle's manual for installation guidance specific to your platform.
SKU: 115674254 • Width: 3.2in • Height: 0.5in • Depth: 4.7in • Weight: 0.06oz