An ASG Scorpion Evo M4 Lower is shown here assembled by Thors 3D Print... "This is a guide on how to assemble the M4 Lower for the Airsoft ASG Scorpion Evo. This is one of the first times recording stuff, so bear with me, as I figure it out.

You can get the M4 Lower files on Printables.com under 'Airsoft ASG Scorpion Evo M4 Mag Lower'."