From Wiktionary, the free dictionary
sawn-off (plural sawn-offs)
- A sawn-off shotgun.
sawn-off (not comparable)
- Of a long-barrelled firearm, having had the stock sawn off.
1992, Bob Magor, Blood on the Board, page 38:He wore a crazed expression / As he waded in the car / For some ammo and his sawn-off twenty-two.