[Hectic]

yeah the sizing sucks on them, idealy youd want 5.95-5.98mm but i had a buddy read some bbs as wide as 6.04mm biovals included. Definately gunna jam, and or lose a bunch of velocity in a 6.01-6.04mm barrel, a stock 6.06-6.08 inner they will work, or should at least but otherwise theyre useless, not to mention alot of em were not perfectly round and had alot of odd air bubbles ie: they didnt have one symetrical one in the middle but looked rather like swiss cheese when cut open