$55.05
Availability: In Stock
The CMMG MK4 Black Steel AR Platform Receiver Extension is a factory-spec replacement and upgrade component for CMMG's Mk4 rifle platform. If you're maintaining a CMMG Mk4, building a faithful clone of the factory design, or simply need a direct replacement for a worn or damaged receiver extension, this part is engineered to the same standards and tolerances as CMMG's production rifles. It's the correct choice when you want proven compatibility and that factory-tuned fit without guesswork.
CMMG's Mk4 platform has earned a reputation for reliability and precision build quality, and that standard extends to every component—including the receiver extension. This isn't a generic AR part adapted to fit; it's purpose-designed for the Mk4 system. Whether you're refreshing an aging rifle or assembling a custom build that mirrors CMMG's factory specs, using the correct OEM-equivalent receiver extension ensures your stock assembly functions as intended and maintains the rifle's intended handling and ergonomics.
Black steel construction keeps the appearance consistent with standard AR builds while offering the durability expected from a firearm component. If you're deep in the weeds of an AR build or maintenance and need a receiver extension that doesn't require trial-and-error fitting, this is the straightforward, reliable answer for Mk4 owners and builders.
No. This is designed specifically for the CMMG Mk4 platform. For other AR-15 variants, you'll need a receiver extension engineered for that specific system.
The facts provided cover the receiver extension itself; confirm with your order or contact Bosque Outdoors directly for details on any included hardware or accessories.
It works for both. Whether you're replacing a worn part on an existing Mk4 or building a complete rifle using CMMG Mk4 specs, this receiver extension will deliver the factory-intended fit and function.
SKU: 115715090 • Width: 4.6in • Height: 1.8in • Depth: 8.8in • Weight: 0.25oz
Availability: In Stock
The CMMG MK4 Black Steel AR Platform Receiver Extension is a factory-spec replacement and upgrade component for CMMG's Mk4 rifle platform. If you're maintaining a CMMG Mk4, building a faithful clone of the factory design, or simply need a direct replacement for a worn or damaged receiver extension, this part is engineered to the same standards and tolerances as CMMG's production rifles. It's the correct choice when you want proven compatibility and that factory-tuned fit without guesswork.
CMMG's Mk4 platform has earned a reputation for reliability and precision build quality, and that standard extends to every component—including the receiver extension. This isn't a generic AR part adapted to fit; it's purpose-designed for the Mk4 system. Whether you're refreshing an aging rifle or assembling a custom build that mirrors CMMG's factory specs, using the correct OEM-equivalent receiver extension ensures your stock assembly functions as intended and maintains the rifle's intended handling and ergonomics.
Black steel construction keeps the appearance consistent with standard AR builds while offering the durability expected from a firearm component. If you're deep in the weeds of an AR build or maintenance and need a receiver extension that doesn't require trial-and-error fitting, this is the straightforward, reliable answer for Mk4 owners and builders.
No. This is designed specifically for the CMMG Mk4 platform. For other AR-15 variants, you'll need a receiver extension engineered for that specific system.
The facts provided cover the receiver extension itself; confirm with your order or contact Bosque Outdoors directly for details on any included hardware or accessories.
It works for both. Whether you're replacing a worn part on an existing Mk4 or building a complete rifle using CMMG Mk4 specs, this receiver extension will deliver the factory-intended fit and function.
SKU: 115715090 • Width: 4.6in • Height: 1.8in • Depth: 8.8in • Weight: 0.25oz
