New HM Defense HMB AR-15 Bolt with Cam Pin Socket
By Hrachya H
HM Defense has announced that their new HMB AR-15 bolt is now available for purchase. What makes it different is that instead of having a cam pin hole it has a cam pin socket. In other words, the cam pin hole in this bolts is not machined all the way which increases the amount of material in […]
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Source:: The Firearm Blog
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