Mossberg 500 ATP 12 Gauge Pump-Action, 18.5" Cylinder-Bore Barrel, Pistol-Grip-Only, 5-Round, ATP-Marked LE/Special-Purpose
This Mossberg 500 ATP is the ATP-marked law-enforcement/special-purpose variant of the proven Model 500 platform. It features an 18.5" steel cylinder-bore barrel with a plain, non-rib profile and a brass bead front sight, paired with a pistol-grip-only configuration and a 5-round tubular magazine. Made in the USA, it includes front and rear sling attachment points. Note that the tang safety button/plate is missing, and the shotgun has no safety installed.
Condition
Overall Condition: Poor condition.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Specific Condition Notes: The shotgun has no safety installed; the tang safety button/plate is missing. There are wear and usage marks on the magazine tube from pump operation. There are light scratches on the exterior of the barrel and receiver.
What’s Included
- Mossberg 500 ATP 12 Gauge pump-action shotgun
The ATP designation denotes a special-purpose version built for duty use, combining compact overall length with a plain 18.5" cylinder-bore barrel for straightforward handling. The barrel is non-rib and fitted with a brass bead front sight, with no rear sight.
This example is set up in a pistol-grip-only configuration with a black synthetic, finger-grooved grip and a black synthetic ribbed forend. The aluminum alloy receiver wears a black finish, and the overall firearm shows a mix of black and blued finishes. Sling attachment points are installed at the front and rear.
Chambered in 12 Gauge, it accepts both 2 3/4" and 3" shells and feeds from a 5-round tubular magazine. The action is pump-operated and built on the Mossberg 500 series architecture, manufactured in the USA.
As noted, the tang safety button/plate is missing and the shotgun has no safety installed. For a buyer seeking a repair project or components, this setup lends itself to replacing the safety assembly or parting out as needed.