viewing   at :07 you can see him twist the gun 50 degrees and his wrist the other 10 to twist the bolt  at :08 his whole hand twists the back of the gun at :11 he twists the gun 90 degrees to turn the bolt at :12 he literally bops the bolt back into place with his open palm you can see ian from forgotten weapons do the same thing here:   e8wibtgu at 1:55
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