The most common complaint that I got with the Manticore project is that the receivers are just too big for most printers. I've split them up into smaller parts to make it more doable for most people. 

You will need ten 1.5 inch 8x32 screws and matching nuts to assemble them.

Feel free to leave a comment or message me if you need any help!

UPDATE 2/15/2025 - fixed the “lower (rear)” file, which was not up to date. It did not have the stopper on the inside to stop the lower from sliding out backwards and disconnecting from the upper receiver. This has been corrected, and the respective step and f3d files have also been updated to include this change.