The Mossberg 590RM stands as a formidable 12-gauge pump-action shotgun engineered for demanding tactical and defensive scenarios. This platform integrates Mossberg’s proven reliability with an extended capacity and robust construction, providing a dependable solution for preparedness.
Key Features
Robust Pump Action System
The 590RM utilizes Mossberg’s signature pump-action mechanism, renowned for its consistent cycling and positive feed under varying conditions. The system incorporates dual extractors for reliable spent casing ejection, an anti-jam elevator to maintain smooth shell presentation, and a positive steel-to-steel lockup for enhanced structural integrity and operational longevity.
Extended Capacity Magazine
Equipped with an extended magazine tube, the 590RM offers a significant 9+1 round capacity with 2.75-inch shotshells, ensuring substantial ammunition on-hand for protracted engagements or multiple target acquisition scenarios.
Heavy-Walled Barrel Construction
This model features an 18.5-inch heavy-walled barrel, optimizing durability and mitigating heat distortion during sustained fire. The barrel’s robust profile contributes to consistent shot patterns and long-term service life.
Integrated Rifle Sights
To facilitate rapid and precise target acquisition, the 590RM integrates front and rear rifle sights. This sight configuration provides a clear, defined sight picture, enhancing engagement accuracy over standard bead sights.
Ambidextrous Tang Safety
The top-mounted tang safety design allows for intuitive, ambidextrous manipulation, enabling rapid and secure firearm status changes for both left and right-handed operators.
Durable Synthetic Furniture
The shotgun is outfitted with durable black synthetic stock and forend, designed to withstand harsh environmental conditions and reduce overall weight while providing a secure grip.
Technical Specifications
- Manufacturer: Mossberg
- Model: 590RM
- Gauge: 12 Gauge
- Chamber: 3″ (Accepts 2.75″ and 3″ Shotshells)
- Barrel Length: 18.5 inches
- Capacity: 9+1 Rounds (2.75″ Shotshells)
- Sights: Front Rifle Sight, Rear Rifle Sight
- Finish: Matte Black
- Stock: Synthetic (Black)
- Forend: Synthetic (Black)
- Action Type: Pump Action
- SKU: LIP|MB50218









