Mossberg 500 12 Gauge Pump-Action, 18.5" Barrel, 3" Chamber, ATI Telescoping Stock, Shell Carriers, Picatinny Rail
This Mossberg 500 is a U.S.-made 12-gauge in a defensive/security configuration with practical, installed upgrades. It features an 18.5-inch steel barrel with a fixed cylinder bore, a 3-inch chamber, and a 5-round tubular magazine. Custom touches include an ATI telescoping adjustable buttstock with a separate pistol grip, receiver-top Picatinny rail, receiver-mounted and buttstock-mounted shell carriers, and a ribbed synthetic forend with a Mossberg-branded strap.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Overall Condition: Good - Clean, well-maintained, minor wear marks.
Specific Condition Notes: There are scuffs, scratches, and wear throughout.
What’s Included
- Shell Carrier: Receiver-mounted shell carrier (installed)
- Shell Carrier: Buttstock-mounted shell carrier on ATI adjustable stock (installed)
- Forend Strap: Mossberg-branded forend strap (installed)
- Accessory Rail: Receiver-top Picatinny rail (installed)
- Stock: ATI telescoping adjustable buttstock with recoil pad and pistol grip (installed)
The 18.5-inch barrel uses a fixed cylinder-bore choke and a brass bead front sight, aligning with its defensive/security role. The chamber accepts 2 3/4-inch and 3-inch 12-gauge shells, feeding from a 5-round tubular magazine.
The action is the proven Mossberg 500 pump with dual action bars and right-side ejection. A tang-mounted, ambidextrous safety provides familiar, easily accessed control.
Upgrades center on fast handling and on-gun ammunition management. The ATI telescoping adjustable buttstock with recoil pad and a separate pistol grip delivers a compact, 11.0-inch length of pull. Shell carriers on both the receiver and stock keep extra rounds at hand.
The receiver is drilled and tapped, and a receiver-top Picatinny rail is installed for mounting accessories. Furniture includes a ribbed synthetic forend fitted with a Mossberg-branded strap. The aluminum-alloy receiver has a hard-anodized matte black finish, paired with a steel barrel in matte black.
Made in the United States, this configuration emphasizes straightforward, duty-focused features with practical enhancements already installed.