Tired of cutting up your fingers using the UMP 11/9's charging handle? Printing this sleeve out of TPU will save your skin...literally. Especially if you, like me, printed the charging handle out of PA-CF...ouch.
Print with the softest TPU you own. I used Ninjaflex, but any soft TPU will do. Adjust the settings as you please to net the squishiest sleeve you can.
LBRY Tags: fosscad; 3d printing; firearms; guns; ump 11/9
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