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  1. rickman

    940 Pro Gas Pistons

    I have a 940 Pro Tactical and I took it apart to wipe down before use. I noticed that the piston looks like the piston from a 930, i.e, it doesn't have the cutouts for gas release.The JM 940 Pro has the updated piston. Is the updated 940 gas piston available for the 940 Tactical? Also I am a bit...
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