Collocations for shotgun - noun

12-bore (BrE), 12-gauge (AmE), double-barrelled/double-barreled, pump (AmE), pump-action, sawed-off (AmE), sawn-off (BrE)
The men were armed with sawn-off/sawed-off shotguns.

loaded

cock
fire
be armed with, carry, have, hold
point, raise, threaten sb with
The shotgun was pointed at me.

load, reload
aim
be blasted with

licence (BrE)
cartridge, pellet, shell
blast
The cause of death was a shotgun blast at close range.

wound

of a/the shotgun
the barrel of a shotgun

with a shotgun
He tried to blow his brains out with a shotgun.