HMB Bolt Carrier Group - Black Nitride (Made in USA)
HMB Bolt by HM Defense is made in the U.S.A. and the HMB is 100% compatible with Mil-Spec M16 & AR-15 BCGs and can be installed as a drop-in bolt replacement in any existing M16 or AR-15 rifle. The HMB bolt eliminates the pass through cam pin hole and replaces it with a cam pin socket and tapered cam pin design. This new patented design eliminates the natural weak point of Mil-Spec bolts by significantly increasing the amount of metal (and strength) at the cam pin location. The ultra-hard and corrosion-resistant Black Nitride ensures this BCG's continued reliability and precision. Additional benefits of the HMB design include the elimination of the cam pin hole staking, reduction in potential cam & firing pin contact and a smoother operation of the BCG.
Features:
- M16 Style (Full Auto)
- .223/5.56 Caliber
- Mil-Spec
- Precision Machined
- Heat Treated Steel
- HMB Bolt - 9310 steel
- Cam-Pin 4340 Steel
- 8620 Gas Carrier
- Made in USA
- Ultra Hard Black Nitride Finish
- Fits: AR-15 / M16
WARNING to California Residents: ⚠️ According to California's Proposition 65, some products sold on this website may expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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