This Receiver Extension is for your MK4 and is constructed of steel with a black finish.
Specifications and Features:
- CMMG AR-15 Receiver Extension M4 55CA9D7
- Compatible with all Mil-Spec diameter stocks
- Aluminum
- Hard Coat Anodized Finish
- Matte Black
WARNING
This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
www.p65warnings.ca.gov
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