Mossberg 500 Security 12 Gauge Pump Shotgun with Blackhawk Knoxx SpecOps Stock & Side-Saddle
This customized Mossberg 500 Security stands out with a recoil-reducing Blackhawk Knoxx SpecOps collapsible stock and an eight-shot side-saddle shell carrier already installed. The 18.5-inch cylinder-bore barrel, tang safety, and optics-ready receiver combine proven duty features with practical upgrades buyers often add later—making this a turnkey home-defense pump gun.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Specific Condition Notes: The barrel shows light wear consistent with minimal range use, and the bore remains clear with no obstructions.
What’s Included
- Mossberg 500 Security 12 Gauge pump-action shotgun
- Blackhawk Knoxx SpecOps 6-position collapsible recoil-reducing stock (installed)
- Polymer 8-shot side-saddle shell carrier (installed)
The forged aluminum alloy receiver keeps weight manageable and is drilled and tapped at the factory, so adding optics or a rail is straightforward.
The 18.5-inch carbon-steel barrel is chambered for both 2 3/4-inch and 3-inch shells, giving flexibility in load selection while retaining a compact overall length for maneuverability.
The Blackhawk Knoxx SpecOps stock offers six length-of-pull positions down to 12 inches and incorporates a recoil-reducing mechanism that helps tame 12-gauge buckshot and slug loads.
An ambidextrous tang safety, ribbed polymer fore-end, and twin action bars contribute to the Model 500’s reputation for intuitive handling and reliable cycling.
The installed polymer side-saddle holds eight additional shells on the receiver’s left side, keeping immediate reloads within reach without altering the shotgun’s balance.