Dark mode is

Young Mfg Chrome AR-15 Bolt Carrier Group (BCG) - Full Auto (HMB Bolt)

In stock
Only 3 left

Young Mfg Chrome AR-15 Bolt Carrier Group (BCG) - Full Auto (HMB Bolt)


This is YM's standard M16 Bolt Carrier Group. As with all of their carriers they leave material on all critical areas then send them out for heat treat. Next they precision grind the carrier inside and out to remove any distortion caused by the heat treat process. All of the standard carriers have 30% wider rails than the typical Mil Spec carrier to give you more contact area in the upper receiver.

The HMB Bolt by HM Defense eliminates the pass through cam pin hole and replaces it with a cam pin socket and radiused cam pin design.  The 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 result- NO MORE BROKEN BOLTS!

The HMB Bolt also reduces contact between cam pin and firing pin, enabling smoother operation of firing pin, bolt lugs and aft gas rings.  The new cam pin socket also retains lubrication for extended operations.

Weight: 11.3 ounces.

More Information
Manufacturer Young MFG