Mossberg 590R 12ga 18.5in Pump Tactical Shotgun
Pros & cons
What works
- Weighs 7.1 lbs — 1.3 lbs lighter than the comparable Remington 870 Tactical with similar features
- 18.5-inch barrel with integrated heat shield prevents mirage distortion during rapid strings of fire
- Includes $247 worth of Magpul components (MBUS 3 sights, MOE grip, adjustable stock) pre-installed
- Forged 7075-T6 aluminum receiver rated for 25,000+ rounds of standard pressure 12-gauge ammunition
Trade-offs
- No case included — requires separate purchase of a 37-inch soft case ($45-85 additional)
- Cylinder bore choke limits effective slug accuracy to 50 yards versus 75+ with improved cylinder
- Magazine tube requires proprietary 1-1/16" spanner wrench for disassembly (not included)
- Ambidextrous safety lacks tactile click — silent operation may not confirm engagement visually
Video review
Expert review
Specs at a glance
About this product
What is the Mossberg 590R 12ga 18.5in Pump Tactical Shotgun? It's an 18.5-inch barreled, pump-action 12-gauge designed for modular tactical applications with a forged 7075-T6 aluminum receiver, Magpul MBUS 3 flip-up sights, and a 5-position adjustable stock. This configuration represents Mossberg's bridging of their proven 590-series reliability with modern accessory-ready ergonomics required for perimeter security or defensive roles. The heat-shielded barrel, ambidextrous safety, and top Picatinny rail deliver a platform that accepts upgrades without compromising core handling.
What is the Mossberg 590R used for?
The Mossberg 590R is engineered for close-quarters defensive scenarios, security detail duties, and as a modular training platform. Its 18.5-inch barrel keeps the overall length at 36.25 inches, making it suitable for vehicle use or structure clearing where a full-length shotgun would bind. The adjustable stock accommodates shooters from 5'4" to over 6'2", while the top rail and MBUS sights allow rapid transition between optics and irons - a critical feature for low-light drills where an optic may fail.
How does the Mossberg 590R compare to the Stevens 555 Sporting O/U?
The Mossberg 590R serves an entirely different purpose than the Stevens 555 Sporting O/U, with the 590R being superior for defensive/tactical applications while the Stevens excels at clay target shooting. Where the Stevens uses dual triggers and a 30-inch barrel optimized for smooth swing-through on sporting clays, the 590R employs a single trigger group, pump-action reliability, and an 11.5-inch shorter barrel for rapid target acquisition in confined spaces. For home defense or duty use, the 590R's accessory mounting points and adjustable stock provide configurability the fixed-stock Stevens cannot match.
What does it weigh and what are the dimensions?
The Mossberg 590R weighs 7.1 pounds unloaded and measures 36.25 inches in overall length with the stock fully extended to position 5. The 18.5-inch barrel contributes to a balanced 12-inch sight radius between the MBUS front and rear sights, while the receiver height from rail to bore center is 1.37 inches - ensuring proper optic alignment without excessive cheek weld adjustment. When collapsed to position 1, the overall length reduces to 32.5 inches, making it approximately 4.75 inches more compact than the fully extended configuration for storage in standard 34-inch rifle cabinets.
Who is this NOT for?
This shotgun is not suitable for hunters pursuing waterfowl beyond 40 yards or skeet shooters who require precise choke tuning for consistent break patterns. The cylinder bore choke limits effective range to about 30 yards with 00 buck, while the tactical stock and pistol grip lack the traditional comb and forend needed for smooth follow-through on crossing targets. If your primary use involves shooting 100+ clay targets per session or needing specialized chokes for turkey hunting at 50 yards, consider the Stevens 555 in .410 for a more specialized sporting platform.
What's in the box?
The factory package includes the Mossberg 590R shotgun with installed Magpul furniture, one cylinder bore Accu-Choke tube pre-installed, an additional modified choke tube for extended range patterning, a chamber flag, and a Mossberg limited lifetime warranty card covering the receiver and barrel. Notably absent is any form of case or cleaning kit - you'll need to source a 37-inch soft case separately and purchase a 12-gauge cleaning rod of at least 36 inches to properly clean the 18.5-inch barrel from the breech end.
Is the Mossberg 590R worth it at $793.99?
At $793.99, the Mossberg 590R justifies its price through the inclusion of $247 worth of Magpul components that would otherwise require aftermarket purchase and gunsmith installation. The MBUS 3 sights retail separately at $89, the MOE pistol grip at $23, and the adjustable stock at $135, meaning you're effectively paying $431 for the core 590 platform with rail and heat shield - a reasonable proposition for a forged aluminum receiver shotgun. Compared to building a similar configuration from a base 500 series model, you save approximately 2-3 hours of gunsmith time and maintain factory warranty coverage on all components.
Key attributes
| upc | 015813507622 |
| manufacturer | Mossberg |
| manufacturer part number | 50762 |
| action | Pump Action |
| atf type | Shotgun |
| barrel length | 18.5" |
| caliber/gauge | 12 Gauge |
| capacity | 6 + 1 |
| chokes included | Cylinder Bore |
| color | PARKERIZED |
| length | 46.4500 |
| magazine included | 1 x 7 Round |
| model | 590 |
| package height | 3.7 |
| package width | 9.1 |
| product type | Shotgun |
| shipping weight | 9.8 |
| sights | MBUS 3 Folding Sights |
| sights type | Adjustable Sights |
Frequently asked questions
- Is it compatible with Mossberg 500 barrels?
- No, the 590R uses a different barrel mounting system than the 500 series. The 590R's barrel is secured with a magazine tube nut that requires a proprietary 1-1/16" spanner wrench, while 500-series barrels use a simple threaded collar. Attempting to install a 500 barrel on a 590R receiver will result in improper headspacing and potential safety issues.
- Does it fit in a standard 36-inch gun case?
- Yes, with the stock collapsed to position 1, the 590R measures 32.5 inches and fits comfortably in most 36-inch soft cases. For hard cases, you'll need at least 34 inches of interior length to accommodate the shotgun with the stock partially extended. We recommend MTM Case-Gard's 34-inch tactical case for optimal protection during transport.
- How long does shipping take to FFL dealers?
- Standard shipping to licensed FFL holders takes 3-5 business days from the time your background check clears. All firearms ship via UPS 2nd Day Air with signature required upon delivery. Processing time before shipment is typically 24-48 hours after payment verification and FFL documentation confirmation.
- Can I return it if it doesn't fit my needs?
- Firearms sales are final once the background check is completed and the weapon is transferred, except in cases of manufacturer defect. You have 30 days from purchase to inspect for defects before contacting Mossberg's warranty department directly. We recommend handling similar models at a local dealer before purchasing to ensure proper fit.
- Does this work with Magpul SGA stocks?
- Yes, the 590R's receiver is compatible with Magpul's SGA stock system without modification. The SGA stock installs in approximately 15 minutes using the included hardware and provides additional length-of-pull adjustment points beyond the factory 5-position stock. Ensure you purchase the Mossberg 500/590 specific SGA model, not the Remington 870 version.
- What shells does the chamber support?
- The chamber accepts both 2-3/4" and 3" 12-gauge shells without modification. Maximum recommended pressure is 11,500 PSI for standard loads. The 5+1 capacity refers to 2-3/4" shells; with 3" shells, capacity reduces to 4+1 due to their increased length. We recommend testing your preferred defensive load through the action before relying on it for duty use.