Bingo Airsoft Designs - Odin Innovations M12 Speed Loader Adapter for UMP
This is an UMP mid cap magazine adapter for the popular Odin Innovations M12 Speed Loader. This 3D printed adapter is made from premium quality ABS/Polycarbonate plastic and features a design that locks into the M12 speed loader, as well as a spring loaded magazine lock for the UMP mid cap magazine. The feed tube makes it extremely durable.
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Product says UMP magazine adapter but really it's for the newer UMP mags that has the skinny profile and wings on top. I have a UMG and the magazines are nowhere near able to fit.