MP5k m4 adapter backplate
thingiverse
MP5K backplate for M4 style collapsible AEG stock. There's also a shorter LR300 version without a wire hole. Unfortunately, I don't have a buffer tube to test it on, so if you make the M4 version, please share your experience. Print upright with supports, and you may need to enlarge holes slightly to get a good fit on your gun. I've made a new version available at https://www.thingiverse.com/thing:4236162. This one should at least fit JG bodies. Some users have noted that this design doesn't fit all MP5K's, specifically CA and JG models. I'll post updated versions soon to address these issues.
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