HM Defense Bolt Carrier Groups for AR-15
Featuring the patented HMB bolt, HM Defense’s BCGs offer durability that’s greater than mil-spec for reliability you can count on.
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HM Defense HMB Enhanced Bolt and Cam Pin for AR-15
Enhanced Durability AR-15 Bolt The HMB bolt has a very specific mission: to prevent your AR-15 bolt from snapping in half around the cam pin. This is the most common...Only$89.99 -
HM Defense Nitride M16 Bolt Carrier Group with HMB Bolt
Complete Nitride HMB Bolt Carrier Group This bolt carrier group goes above and beyond mil-spec, with a key upgrade to prevent broken bolts. This nitride bolt carrier group from HM...Only$164.99
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