Speed Beez Lever Loader Easy to use SIG MPX magazine Speed Loader! Need an incredible 9mm speed loader for your SIG SAUER MPX magazine? Give the Speed Beez MPX Speed Loader a try! Speed Beez Loader for the SIG MPX Magazines Our magazine loader is easy to learn – just insert the magazine into the loader until it locks in. Next, drop a round into the hole (case first), using a scissors motion will load the round into the magazine. Just repeat until your mags are full. The Speed Beez magazine loader gives you the mechanical advantage you're looking for, for your SIG MPX mags. Try the Speed Beez speed loader today!