This is our standard M16 Bolt Carrier Group. As with all of our carriers we leave material on all critical areas then send them out for heat treat. Next we precision grind the carrier inside and out to remove any distortion caused by the heat treat process. All of our standard carriers have 30% wider rails than the typical Mil Spec carrier to give you more contact area in the upper receiver.Weight: 11.3 ounces. Available in AR15 or M16 type.What makes Young Manufacturing AR15 bolts and bolt carriers so accurate? Check our “What makes our Bolt Carriers Better?” on our home page.
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.