Please be warned, i have three of these mags (one in the box and two from a store) and if you more than approx 50bbs loaded the Mac-10 will have difficulty feeding them. It will dry fire then roll out the barrel.
If you have the suppressor attached the bbs will sit in there till one successfully fires and smacks these lay-abouts out the barrel like a shotgun. As a result i max my mag out then turn the speed loader upside down and click the excess bbs back into it, counting as i go. The hi-caps on the other hand are 100% fine and reliable! Get those if your site doesnt require mids :)
