Mossberg 500 ATP 12 Gauge Pump-Action, 18.5 in Cylinder-Bore Barrel, 5+1, Pistol-Grip, Made in USA
This Mossberg 500 ATP is a law-enforcement–oriented configuration featuring an 18.5 in cylinder-bore barrel, pistol-grip-only furniture, and a 5+1 capacity. It combines a blued steel barrel with a black anodized aluminum-alloy receiver, ambidextrous top-tang safety, and a simple bead sight setup. Made in the United States, it retains the practical features and controls that define the ATP pattern.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Specific Condition Notes: Light blemishing and scuffing are present on exterior surfaces, with areas of light surface rust. The action cycles and functions properly.
What’s Included
- Mossberg Model 500 ATP 12 Gauge pump-action shotgun
The ATP configuration centers on a compact 18.5 in cylinder-bore barrel for straightforward handling and patterning. Capacity is 5+1, and the gun uses right-side ejection with a standard under-barrel magazine tube capped by a knurled end-cap with an integral sling-swivel stud.
Controls are simple and intuitive, with Mossberg’s ambidextrous top-tang manual safety featuring a red indicator dot. The receiver top carries an anti-glare serration strip. Construction pairs a blued steel barrel with a black anodized aluminum-alloy receiver and a polymer trigger guard.
The furniture is duty-focused: a pistol-grip-only synthetic stock with finger grooves and checkered panels, matched to a black synthetic ribbed forend. Sighting is via a plain, non-vented barrel with a brass bead front sight and no rear sight.
This shotgun is chambered for both 2.75 in and 3 in 12-gauge shells for flexibility in load selection. It follows the ATP pattern without a heat shield, bayonet lug, or rear/ghost-ring sight. Marked Made in U.S.A., it presents a clean, purpose-built setup with durable materials and finishes.