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Not known Details About cmmg mk57

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In the event the bolt carrier moves forward, the bolt rotates and locks the lugs before the supporting lug abutments. In the event the group moves rearward, the cam pin forces the bolt to rotate and unlock in the barrel extension. The rotating bolt allows tension in the barrel https://augustchdaw.shoutmyblog.com/30237012/cmmg-mk57-an-overview

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