I made this over a few months from a very basic model from another user, all files are provided, mag and attachments coming soon but haven't printed yet so don't know if they fit.

the files are for a 1/4 version of the gun but the picture are actually 3/4 scale around 66cm long, I recommend this size as all prints fit on a 22x22x25 sized printer, feel free to comment if you have any questions