Grenade launcher & shell - £10 or so. TM M870 - £325 Frizzle man, do you think he would honestly be asking about a grenade launcher if he had that much money.....
The're great. They look the nuts and are certainly more intimidating than a shotty. Moreover a shotgun at best gives you 6 BBs at a time, Moscarts can do 50+. Manly. Grrrr.