.300 Blackout Bolts and Carriers by HM Defense
Sort
Filter
List
Grid
-
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
HM Defense provides unmatched durability with their HMB bolt. It’s a perfect fit for a .300 Blackout AR-15, as a drop-in upgrade with their bolt carrier groups.
Back to top