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CMMG AR-15 Receiver Extension Castle Nut

CMMG AR-15 Receiver Extension Castle Nut « »

UPC: 815835017426

Availability: In stock

  • Compatible with Mil-Spec AR-15 buffer tubes
  • Durable and lightweight design
  • Easy installation
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Finish up your lower receiver build with the CMMG® AR-15 Receiver Extension Castle Nut. This castle nut is compatible with Mil-Spec AR-15 buffer tubes.

Warning: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Color: Black
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