The Mossberg 590RM is a tactical 12-gauge pump-action shotgun purpose-built for home defense and professional security work. This short-barreled, magazine-fed platform combines Mossberg's legendary reliability with modern ergonomics and capacity that outperforms traditional tube-fed shotguns in the same footprint. The 590RM's 11.5-inch barrel and 10-round double-stack magazine capacity make it a compact, highly maneuverable choice for tight spaces—vehicle storage, home hallways, and close-quarters scenarios where speed and handling matter.
What sets the 590RM apart is its rotary ambidextrous safety selector and purpose-designed controls. The enlarged beveled loading port and exposed magazine follower make reloads instinctive under stress. The adjustable stock (12.5–16.5 inches) with a chisel folding mechanism folds completely along the receiver for further compactness, and the flat-profile trigger breaks cleanly and predictably. The top Picatinny rail is cut specifically for optics mounting, letting you build your sight picture without compromise. Cerakote polymer-ceramic coating on the receiver resists corrosion and abuse, a real asset in professional or high-use environments.
The 590RM comes set up for business: parkerized 11.5-inch barrel with an integrated heat shield, cylinder choke installed, and two quick-detach ports for sling or light mounting. It weighs 7.6 pounds and handles like a rifle despite its 30.5-inch overall length (stock extended)—well-balanced, fast to target, and built to run in serious applications where you need a shotgun that doesn't compromise on capacity or ergonomics. Whether you're setting up a truck gun, securing a property, or training with a modern tactical platform, the 590RM delivers the pedigree and features serious users expect.
Key Features
- Double-stack magazine design holds 10 rounds for capacity and speed without bulk
- Ambidextrous rotary safety selector operates smoothly from either hand
- Compact 11.5-inch barrel with integrated heat shield for sustained fire and control
- Adjustable stock (12.5–16.5 in. LOP) folds completely along the receiver for tight storage and carry
- Flat-profile trigger with crisp, predictable break
- Top Picatinny rail optimized for mounting optics
- Enlarged, beveled loading port with exposed follower for fast, intuitive reloads
- Cerakote-coated receiver resists corrosion and wear
- Two quick-detach ports for sling and light attachment
- Interchangeable recoil pad included
Specifications
| Gauge | 12 |
| Action Type | Pump-Action |
| Barrel Length | 11.5 in. |
| Barrel Finish | Parkerized |
| Overall Length (Stock Extended) | 30.5 in. |
| Weight | 7.6 lbs |
| Chamber | 2.75 in. |
| Magazine Capacity | 10+1 |
| Choke System | Accu-Choke; Cylinder Bore Installed |
| Stock | 8-Position Adjustable with Chisel Folding Mount and Buffer Tube (Black) |
| Length of Pull | 12.5–16.5 in. (Adjustable) |
| Safety | Rotary Ambidextrous Selector |
| Trigger | Flat Profile |
| Sights | Top Picatinny Rail |
| Receiver Finish | Cerakote Polymer-Ceramic |
| Grip | MOE+ Pistol Grip |
| Accessory Ports | 2 Quick-Detach Ports |
Frequently Asked Questions
What ammunition does the 590RM shoot?
The 590RM chambers 2.75-inch 12-gauge ammunition, the standard for most modern shotguns. It will not reliably cycle 3-inch magnum loads due to its design, so stick with standard 2.75-inch shells for defense or tactical work.
Can I mount an optic on this shotgun?
Yes. The top Picatinny rail is cut and positioned specifically for optics mounting. You can run a red dot, reflex sight, or magnified optic depending on your needs and training.
Does the stock really fold?
Yes. The chisel folding stock mount allows the adjustable stock to fold completely along the reverse side of the receiver, significantly reducing the gun's footprint for storage or transport. The stock itself adjusts from 12.5 to 16.5 inches before folding.
What comes in the box?
The 590RM ships with an interchangeable recoil pad. It does not include ammunition or accessories like optics or slings, though the two QD ports are factory-installed for easy sling or light mounting.

