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It puts compression on the spring inside the bolt which pushes ******ds on the ball bearing that fits into the recess on the pull pin. It's the complicated way of making somthing not complicated to hold it in.
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Mad Up'd Black/ Blue B2K4 PDS
1 of 1 Black/ Blue B2K4 PDS closed bolt pump
Crazy milled Silver B2K2 X-Mill
Mad Up'd 2000 Black/ Silver Autococker
My ICDO feedback. 24+/0-
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And this product improved my performance the msot at one time then any other up on my gun.
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Demented Products 6061-T6 ICDU Rammer Review. 9/10
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