airsoft m4/m16/ar-15 crane stock backplate and lock

I made part of crane backplate to replace old one, this will also keep rubber part in place. I don't remember which manufacturer of stock, but it was cheap Chinese.

This is made for this specific stock model, but with few tweaks you can make it fit any stock. I have no idea how to post source files so you can edit it to fit your needs, if you want this contact me and tell me what is proper file format for that.

Fusion 360 files:
http://a360.co/2kUIWfc
http://a360.co/2kBcuzd