Upgrading the cylinder is more then worth it, I put a AK length(455mm) tightbore in my M4A1 and had a few shots with it before I got my hands on a M16 Type 0 cylinder, sure it shot nice, straight, ect. But after putting that cylinder in, I was amazed at the difference in overall sound performance from the gun, but the range boost, accuracy and most of all, shot consistancy. It is a worthwhile upgrade for the long run, with a longer then stock barrel.
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W1-5
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