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UMAREX KWA MP7 MLOK Side Rail Replacement

Made this MLOK replacement for the stock side rails for the KWA MP7. Most available models online are for other brands
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updated November 16, 2025

Description

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Made this MLOK replacement for the stock side rails for the KWA MP7. Most available models online are for other brands which are mostly too big for the KWA MP7.

Do note the MLOK spacing in between the two MLOK segments are reduced to accommodate the size of the MP7 but the MLOK segments are to spec. So please double check if you plan on using 2-segment MLOK attachments some fitment may not be compatible.

The one file works for both rail sides.

Can use the stock Bolts/Screws for the rails, I used a spare Allen Thin Head Cap Screw M4x8 for a more flush look/feel. Or maybe a round head screw would work better.

Printed my prototypes at .3 layer height, latest one was at .2 with .4mm nozzle facing down with supports on 2 walls with PETG.

Would probably work best with 0.12 layer height depending on your preference for quality and/or strength.

Feel free to use what works for you and your printer

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