This is an open source 37mm Launcher based on a linear firing pin design similar to cheap Cobray branded launchers.
This launcher uses a simple swing open design and a separate cockng mechanism so it can be loaded and manipulated without cocking the hammer.
This launcher uses a 38mm ID fence post available at most hardware stores as a barrel blank.

The full list of required hardware and the standalone mount will be published soon.

Be aware that this 37mm launcher is exempt from all firearm regulation as a signalling device and smoke projector. Posession of anti-personnel impact based 37mm ammunition and a 37mm launcher individually is legal but their posession together requires registry as a Destructive Device. This laucher is not intended to handle or capable of firing these high pressure loads.