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Closed Bolt vs Open Bolt Operation! #shooting #sterling #ar9 #submanchinegun #smg #pcc

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A quick demonstration of the difference between closed bolt operation and open bolt operation.

Closed bolt: CMMG radial / rotary delayed blowback 9mm upper on KE Arms WWSD KP-15 lower
Open Bolt: Sterling Mk.4 L2A3 9×19

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