Mossberg 590A1 12 Gauge Pump Shotgun – Heavy-Walled 18.5" Barrel, Magpul Furniture, 7-Shot Capacity
This customized Mossberg 590A1 pairs the platform’s proven MIL-SPEC strength with user-focused Magpul upgrades. A heavy-walled 18.5 inch cylinder-bore barrel, clean-out magazine tube, and ambidextrous top-tang safety deliver the rugged functionality the 590A1 is known for, while the Magpul SGA stock, MOE M-LOK forend, and Limbsaver recoil pad add modern ergonomics and recoil control.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent – Clean, mirror finish, no signs of wear.
Specific Condition Notes: There are mild scuffs and signs of use on the exterior surfaces, consistent with careful handling.
What’s Included
- Magpul SGA length-of-pull spacers
- Spare Magpul MOE M-LOK forend (Mossberg 590/590A1 pattern)
The 590A1 is the only pump shotgun platform to pass U.S. DoD MIL-SPEC 3443G endurance tests, and this example features the same heavy-walled steel barrel that meets that standard. The barrel’s cylinder-bore profile and brass bead front sight suit close-range defensive roles, while the front bayonet lug accepts M7/M9 pattern bayonets for military-style setups.
Magpul’s SGA buttstock provides an adjustable length of pull and a textured pistol-grip section for positive control. The included spacers let you fine-tune the stock to the listed 13.0 inch LOP or extend it as needed. A Limbsaver recoil pad further softens 12 gauge kick during rapid strings.
The Magpul MOE M-LOK forend adds multiple mounting slots for lights, slings, or other accessories. A spare MOE forend is included, giving the buyer flexibility for future configurations.
Mossberg’s top-tang safety remains ambidextrous and intuitive, with a red dot indicator for instant status checks. The clean-out magazine tube simplifies maintenance, and the 6+1 capacity keeps a full load of 2¾ inch or 3 inch shells on tap.