Looking to upgrade or maintain your Mossberg 590 shotgun? Finding the right parts is key to optimizing performance and reliability. Whether you’re a seasoned enthusiast or a new owner, this shopping guide covers the must-have Mossberg 590 parts—offering expert tips and recommendations to help you customize, repair, and enhance your firearm for hunting, home defense, or sport shooting.
Mossberg 590 Parts: Types, Variations, and Applications Comparison Table
| Part/Category | OEM/Aftermarket | Compatibility | Typical Use Case | Key Features |
|---|---|---|---|---|
| Barrels | Both | 590, 590A1, 590S | Replacements, Upgrades | Length, Choke Compatibility, Ported/Non-Ported |
| Bolt Assemblies | Both | 590/500 family | Restoration, Reliability | Material, Style |
| Magazine Tubes/Caps | Both | 590/590A1 | Capacity Change, Repairs | Capacity, Finish |
| Trigger Groups | Both | 590, 590A1 | Custom Trigger, Repair | Material, Pull Weight |
| Stocks & Forends | Aftermarket | 590/500 family | Ergonomics, Customization | Material, Folding/Adjustable |
| Sights/Rails | Aftermarket | 590, various | Upgrade Accuracy | Fiber Optic, Ghost Ring, Picatinny |
| Safety Buttons | Both | 590 series | Ambidextrous, Tactile | Oversize, Textured |
| Heat Shields | Aftermarket | 590, 590A1 | Protection, Tacticool | Steel, Phosphate Finish |
| Springs/Pins/Levers | OEM/Aftermarket | 590/500 family | Wear Parts, Maintenance | Factory Original/Upgraded |
| Complete Parts Kits | Both | 590, 590A1 | Full Build/Restore | Ported, Metal/Plastic TG |
Signs of Quality When Buying Mossberg 590 Parts
1. Material and Construction
- Steel vs. Polymer: Critical components such as bolts, slide tubes, and barrels should be manufactured from quality steel for longevity and strength. Furniture can be either high-strength polymer or wood, depending on your preference.
- Finish Quality: Look for durable finishes like parkerizing, bluing, or phosphate coatings that provide rust resistance, especially on external and moving metal parts.
- Precision Machining: Quality components exhibit tight and consistent tolerances. This ensures a precise fit, which impacts reliability and overall function.
2. OEM vs. Aftermarket
- OEM (Original Equipment Manufacturer): These parts assure compatibility and maintain the original feel and function of your Mossberg 590. They are ideal for repairs or restoration.
- Aftermarket: Reputable manufacturers may offer improved materials, enhanced ergonomics, or performance upgrades. However, verify compatibility, especially with sub-models (like the 590A1).
3. Fit and Finish
- Smooth Edges: Parts should be free from burrs, rough cuts, or sharp edges that might affect handling or assembly.
- Consistent Color/Texture: Uniformity in metal finishing and polymers or wood parts signals quality control.
- Testing & QC: Consider parts from manufacturers known for strong quality assurance and customer service.
Customization Options for Mossberg 590 Parts
1. Stocks and Forends
- Adjustable Stocks: Swap to a collapsible, M4-style, or adjustable length-of-pull stock to enhance fit, especially for different users or tactical applications.
- Aftermarket Forends: Upgrade to a railed forend for attaching lights or vertical grips, or select options with integrated storage.
2. Sights, Rails, and Optics
- Ghost Ring and Fiber Optic Sights: Greatly increase speed and accuracy for both defensive and competitive use.
- Picatinny Rails: Adds the ability to attach red dots, scopes, or additional accessories.
3. Magazine Extension Tubes
- Increased Capacity: Extensions allow the 590 to hold more shells, useful for home defense, competition, or law enforcement. Ensure compliance with local laws.
- Upgraded Followers and Springs: Enhanced feeding and reliability.
4. Heat Shields and Barrel Shrouds
- Heat Management: Metal heat shields protect your hand from barrel heat and add a tactical look.
5. Controls
- Oversized Safety Buttons and Charging Handles: Improve manipulation with gloves and under stress.
- Enhanced Trigger Kits: Lighter pulls and crisp breaks for more precise shot control.
Durability of Mossberg 590 Parts
1. Tested for Toughness
- Military and Law Enforcement Models: The Mossberg 590A1 is the only pump-action shotgun to pass U.S. military rigorous testing. Choosing parts rated for 590A1 offers proven battle-readiness.
- Upgraded Metal Parts: Opt for steel or aluminum, especially for action bars, forends, and trigger housings in high-stress environments.
2. Coatings & Environmental Resistance
- Corrosion Resistance: Pick parts with parkerized or phosphate finishes for extended use in wet or harsh environments.
- Synthetic Furniture: Polymer stocks and forends resist warping, swelling, and cracking due to temperature or moisture.
3. Maintenance and Longevity
- Readily Available Replacement Parts: The popularity of the 590 means springs, pins, and small wear parts are widely available and easily replaced.
- Parts Kits: Full kits can extend your shotgun’s life and support full overhauls or custom builds.
Practical Tips and Best Practices for Choosing and Using Mossberg 590 Parts
1. Verify Model and Compatibility
- Always double-check your specific Mossberg 590 model (590, 590M, 590A1, 590S, etc.) before purchasing parts.
- Some components (such as barrels or magazine extensions) may differ between the standard 590 and the heavier-duty 590A1.
2. Prioritize Reliability
- For life-or-death applications (defense, law enforcement), steer toward OEM or mil-spec-rated upgrades rather than untested aftermarket options.
3. Assess Your Needs
- Are you restoring, upgrading for tactical use, or building for sport/competition? This will guide your choice of parts.
- Home defense users may want higher capacity and improved controls; competitors may focus on lighter triggers and faster handling.
4. Seek Reputable Brands and Sellers
- Buy from brands or sellers with solid warranties, clear return policies, and a reputation for supporting their products.
- Be cautious of used parts—make sure they show no excessive wear, cracks, or corrosion, especially on critical internals.
5. Follow Installation Best Practices
- Use the correct tools to avoid damaging parts or your firearm during installation.
- Refer to the user manual or schematic diagrams when disassembling or upgrading.
- Don’t force-fit parts—the 590 is robust but works best with proper-fitting components.
6. Test After Installation
- After any part replacement or upgrade, perform function and safety checks. Test-fire at the range if possible.
- Always unload and clear your firearm before installation.
Key Mossberg 590 Parts: Technical Features & Specifications Comparison Table
| Part Type | Material | Typical Finish | Compatibility | Special Features/Notes |
|---|---|---|---|---|
| Barrel | Steel | Parkerized/Blued | 12/20 ga, 590/590A1 | Ported/Non-Ported, Choke Threads |
| Bolt Assembly | Forged steel | Polished/Matte | 590, 500, 835 | Complete/Stripped options |
| Trigger Assembly | Steel/Aluminum | Black Oxide/Coated | 590, 590A1 | Metal/Polymer Housing |
| Magazine Tube | Steel | Parkerized/Blued | 5+1, 7+1 590 variants | Extended versions available |
| Stock | Synthetic/Wood | Textured/Finished | All 590 models | Collapsible, Adjustable |
| Forend | Synthetic/Polymer | Textured/Finished | All 590 models | Rails, Storage Options |
| Heat Shield | Steel | Phosphate | 590, 590A1 | Vented/Non-Vented |
| Safety Button | Metal/Aluminum | Black/Anodized | All 590 | Oversize options |
| Sight Set | Steel/Aluminum | Blued/Anodized | All 590 | Ghost ring, Fiber Optic |
| Springs, Pins | Tempered Steel | Natural/Blued | All 590, 500 family | Factory/Enhanced Options |
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Conclusion
Choosing the right Mossberg 590 parts is essential for reliability, performance, and personalization. Whether you’re maintaining a shotgun for self-defense, outfitting for competition, or restoring a trusted workhorse, paying attention to material quality, fit, brand reputation, and your unique needs will ensure satisfaction. The Mossberg 590’s robust aftermarket support and simple design make it an excellent platform for customization and longevity. With the right approach, you can keep your shotgun running smoothly for decades.
FAQ
- What’s the difference between OEM and aftermarket Mossberg 590 parts?
OEM parts are made by Mossberg or their designated manufacturers and guarantee fit and function for the 590. Aftermarket parts are made by third parties and may offer customization or enhancements. Always check compatibility before purchasing.
- Are Mossberg 500 and 590 parts interchangeable?
Many small parts are interchangeable, but some key differences exist, especially in barrels, magazine tubes, and, for the 590A1, heavier-duty components. Confirm compatibility for barrels, stocks, and magazine extensions.
- What are signs of quality in Mossberg 590 parts?
Look for robust materials (like steel), precise machining, durable finishes (parkerized, blued), and a reputation for reliability. Avoid parts with visible defects or signs of poor craftsmanship.
- Which upgrades offer the most benefit for home defense?
Consider a shorter barrel (18.5″), extended magazine tube, ghost ring sights, and oversized controls. These upgrades increase speed, capacity, and ease of handling under stress.
- Can I install Mossberg 590 parts myself?
Most parts can be installed at home with basic tools and reference to a manual or schematic. Take extra care with fire control group or action parts, and consult a gunsmith if in doubt.
- How do I choose between a synthetic or wood stock?
Synthetic stocks offer better weather resistance and are lighter, making them best for heavy use or tactical roles. Wood stocks provide a classic look and balance but may need more care.
- What are the advantages of adding a heat shield or rail system?
A heat shield protects your hands during prolonged shooting. Rails allow mounting lights, optics, or other accessories for improved performance and versatility.
- What should I look for in an aftermarket trigger?
Look for reduced pull weight, crisp break, and a safety mechanism that retains Mossberg’s reliability. Some triggers are drop-in, making installation easier.
- How often should I replace springs and pins?
Regularly inspect and replace these wear parts every few thousand rounds, or if you notice reduced function, light strikes, or sluggish cycling.
- Where can I find parts for discontinued or older model Mossberg 590s?
Many suppliers and specialized gun parts companies carry NOS (new old stock) or used components. Look for parts kits if you’re restoring or need multiple small components. Always check fitment with your exact variant.