I picked up a Spikes Tactical 37mm Launcher a few weeks ago. I mounted it on the bottom rail of my AR! Its a blast so far! Without regestering it as a DD I can only shoot flares, smokes, and tear gas, but it is a fun play toy for the farm and makes for a blast! I will be using the flares in a control burn this febuary and the tear gas as varmint control in the barns and sheds. Fun stuff!