Assault Weapon!

I thought it would be in poor form to go to a Blackpowder shoot only equipped with a Plastic 9mm bullet hose especially when meeting new friends. Mr. Curmudgeon kindly offered this to take. 

Assault weapon version 1.0! It has been in his family for decades yet we can find only limited information about it. Anyone that offers "info" sprouts generic terms and makes an offer on it. So, even if not shooting it I can say I arrived with correct equipment!