Nope, no wheel at all. It's pretty much a spring in a tube except longer.
Mine are STAR branded BTW. Also you'll notice that you can usually only get ~25 of the BB's out of a realcap due to limitations of the realcap mags (spring not strong enough to push the BB into the chamber).
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE