i just put one of these on my ar-15, looks wild! bad part is finding ammo. anybody know where i can find some parachute flares? I have 26.5 mill and 12 guage adapters for it as well, if this helps. i see alot of vids shooting 12 buckshot or slugs out of it too but i guess u need to register it first.

I would not recommend firing live rounds out of a 37 mm launcher even if it were legally registered as a DD. The lock up is certainly not up to the pressures generated by live rounds. They are meant to look like an M203 and are designed to launch low pressure flares only.