The Cobray CM203 37mm flare launcher is not a grenade launcher. It fires distress flares from a 37mm smooth bore and cannot accept 40mm munitions. However, since it looks like an M203 grenade launcher, it is commonly mistaken for one in films on this site. It was built for civilian use as an under slung flare launcher commonly mounted under M16/AR-15s variants and other rifles. It is preferred for most film use over a genuine M203 mainly because, unlike the M203, it is not considered a "Destructive Device" in the U.S. and not subject to NFA regulations.