Blank impact round for CTL

Impact grenade for CTL platform. It detonates a blank 8mm round on impact making a loud noise. Really fun to shoot and useful, especially in CQB games.

Launcher link: https://www.thingiverse.com/thing:3345144

Update 13/01/2019 - added body with no bushing required

How it works:
File Head.stl is the hammer for the blank round. It must be tapered with a M4 tap, and a point screw must be used. Use a screw as light as possible. Since this piece is really light, it doesn't sets the primer when fired with green gas. When the grenades impacts the kinetic energy of the body sets off the round. For this reason is important to have a projectile body with a weight of about 30g.

You will need a 30x11x8 bronze bushing to give the projectile some weight and contain the round. These are widely available and cheap as they're the same used for ultimaker or similar printers.
You can try printing the Body_NoBushing.stl file if you want, it works just as well, but make sure it weights about