The hmb bolt by hm defense eliminates the pass through cam pin hole and replaces it with a cam pin socket and tapered cam pin design.This patented design eliminates the natural weak point of mil-spec bolts by significantly increasing the amount of metal at the cam pin location.It is 100% compatible with mil-spec m16 & ar-15 bcgs and can installed as a drop-in bolt replacement in any existing m16 or ar-15 rifle.
Finish: Black Nitride Model: HMB Size: 223/5.56 NATO Material: 9310 Steel Bolt Type: Drop In
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