MADBULL BB'S 0.25g Precision Grade 4000 rds (bag) (BB1)
MadBull BBs are put through a pprecision lapping and polishing process to guarantee strict tolerances of (diameter 5.95mm _0.01mm)
MadBull Precision Grade BBs are futher refined using a specially controlled cooling process which prevents bubbles and imperfections from forming, giving you a more accurate BB.
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