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CMMG 55CA9CB Receiver Extension Castle Nut Black Matte MK4

MPN: 55CA9CB  |  UPC: 815835017426
$7 83

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PRODUCT DESCRIPTION

The CMMG 55CA9CB Receiver Extension Castle Nut is a black matte-finished component designed for securing the receiver extension (buffer tube) on compatible AR-15 and MK4 platforms. It is intended for both repairs and new builds, offering a functional solution for maintaining proper buffer tube attachment.

  • Matte black finish for a durable exterior
  • Compatible with AR-15 and MK4 platforms
  • Used to secure buffer tube assemblies

This CMMG receiver extension castle nut is suitable for those assembling or maintaining AR-15 and MK4 rifles, providing a dependable fit for various modern sporting rifle configurations.

    This item is not available to ship to the following state(s):
    Illinois | Washington
SPECS
Finish Matte
SKU ACC-CMMG-55CA9CB
Country of Manufacture No
License Requirement None
Manufacturer CMMG
Mfg. Part Number 55CA9CB
UPC 815835017426
Caliber/Gauge N/A
Action N/A
Barrel Length N/A
Barrel Twist N/A
Barrel Bore Type N/A
Barrel Finish N/A
Barrel Fluting N/A
Barrel Profile N/A
Mount Type N/A
Beam Color N/A
Firearm Fit N/A
Threaded Barrel No
Condition New
Free Shipping No
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