In my my old neighborhood,I had to report to a detective that someone was hunting deer with a grenade launcher,they finally got him after 8 years,but only because someone stole our car in storage,hit a r.v which drew attention to a box labeled grenades,agents saw it and said "that's suspicious"they opened the unlocked box(where any 4 year old walking by could get them) and found two frag grenades,they then opened the trailer and found: rocket launcher parts(the launcher is apparently unaccounted for)and 32 pounds of c4 and other explosives.