Umarex MP-40 Speed Loader
thingiverse
Magazine speed loader for Umarex Legends MP-40 Flip it upside down to print, no support required, I printed at 0.2 mm layer height. Stick it on the magazine and pour the bbs into the funnel. I add powdered graphite to the bbs before loading, helps them feed better and you don't need them to load in perfect alternating pattern in the magazine.
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