Smith & Wesson M&P 40 Shield 3" Barrel - Genuine OEM Factory Part
Restore your M&P 40 Shield to reliable performance with this genuine Smith & Wesson factory barrel. This pre-owned OEM part offers an affordable alternative to new barrels while maintaining the quality and precision you expect from authentic S&W components. Perfect for gunsmiths, budget-conscious shooters, or anyone needing a quality replacement barrel.
Key Features & Benefits
- Genuine Smith & Wesson OEM Part - Factory original component, not aftermarket
- Pre-Owned, Good Working Condition - Inspected and verified functional
- Significant Cost Savings - Affordable alternative to new factory barrels
- Factory Specifications - Manufactured to exact S&W tolerances
- 3" Barrel Length - Standard length for M&P 40 Shield models
- Chambered in .40 S&W - Correct caliber for M&P 40 Shield pistols
Product Specifications
| Manufacturer: | Smith & Wesson |
| Part Number: | 40S8 |
| Model Compatibility: | M&P 40 Shield |
| Caliber: | .40 S&W |
| Barrel Length: | 3 inches |
| Condition: | Pre-Owned, Good Working Condition |
| Weight: | 3 oz |
| Type: | OEM Factory Barrel |
| Finish: | Factory Original |
Compatibility Guide - M&P 40 Shield Models
This barrel is specifically designed for:
- Smith & Wesson M&P 40 Shield (all variants)
- M&P 40 Shield with 3" barrel configuration
- .40 S&W chambering only (NOT compatible with 9mm Shield models)
⚠️ Important Compatibility Notes:
- NOT compatible with M&P 9 Shield - This is a .40 S&W barrel only
- NOT compatible with M&P Shield Plus models - Different barrel design
- NOT compatible with M&P Shield EZ models - Different platform
- Verify your pistol is chambered in .40 S&W before ordering
- Check your current barrel length - this is a 3" barrel
Not sure about compatibility? Contact us with your pistol's model number and we'll confirm fitment before you order.
Why Choose a Pre-Owned OEM Barrel?
Smart Economics: Pre-owned factory parts offer exceptional value. You get genuine Smith & Wesson quality at a fraction of the cost of new barrels, making this ideal for budget builds, backup parts inventory, or cost-effective repairs.
Proven Reliability: This barrel has been inspected and verified to be in good working condition. Factory OEM parts are built to last thousands of rounds, and a pre-owned barrel in good condition still has plenty of service life remaining.
Authentic OEM Quality:
- Manufactured to exact Smith & Wesson specifications
- Same tolerances and materials as new factory barrels
- Proper chamber dimensions and rifling
- Correct headspacing and lockup
- No compromise on safety or function
Who Needs This Barrel?
This pre-owned M&P 40 Shield barrel is perfect for:
- Professional Gunsmiths - Affordable OEM parts for customer repairs and restorations
- Budget-Conscious Shooters - Quality replacement without the new-part premium
- DIY Gun Owners - Replacing worn or damaged barrels on personal firearms
- Parts Inventory Builders - Stocking hard-to-find M&P Shield components
- Backup Parts Collectors - Keeping spare barrels for frequently-carried pistols
- Training Armorers - Cost-effective parts for training and demonstration
- Competitive Shooters - Rotating barrels to extend service life
Common Problems This Part Solves
- Worn or Eroded Barrel: High round counts can wear rifling and affect accuracy
- Damaged Crown: Barrel crown damage from cleaning rods or drops impacts precision
- Barrel Obstruction Damage: Squib loads or obstructions can bulge or damage barrels
- Corrosion or Pitting: Improper storage or maintenance can pit barrel internals
- Failed Inspection: Barrels that no longer meet safety or accuracy standards
- Preventive Replacement: Proactive barrel rotation for duty or carry pistols
- Cost-Effective Restoration: Bringing a neglected M&P Shield back to service
Installation & Fitment Information
Professional Installation Recommended: While experienced gun owners can replace M&P Shield barrels, we recommend professional gunsmith installation to ensure proper fit, function, and safety.
Installation Requirements:
- Complete disassembly of slide assembly required
- Proper gunsmithing tools and workspace
- Knowledge of M&P Shield field stripping and reassembly
- May require minor fitting by qualified gunsmith for optimal lockup
- Function testing and inspection after installation mandatory
What's Included: Barrel only. Does not include sights, recoil spring, or other slide components.
Condition Assessment - What "Good Working Condition" Means
This barrel has been carefully inspected and meets our standards for good working condition:
- ✓ Rifling is intact and functional
- ✓ Chamber is clean and properly dimensioned
- ✓ No cracks, bulges, or structural damage
- ✓ Locking lugs are in good condition
- ✓ Crown is intact (may show normal wear)
- ✓ Bore is clear and functional
Note: As a pre-owned part, this barrel may show cosmetic wear such as holster marks, finish wear, or minor surface scratches. These do not affect function or safety. All pre-owned parts are sold as-is with no warranty.
Why Choose USA Guns And Gear?
- Authentic S&W Parts Specialists - We focus exclusively on genuine Smith & Wesson components
- Rigorous Inspection Process - Every pre-owned part is carefully evaluated before listing
- Expert Support Team - Our firearms parts specialists can answer compatibility questions
- Fast US Shipping - Quick dispatch from our US facility
- Trusted Since [Year] - Serving gunsmiths, armorers, and shooters nationwide
About the Smith & Wesson M&P Shield Platform
The M&P Shield revolutionized concealed carry when introduced, offering a slim, reliable platform in serious calibers. The .40 S&W variant provides substantial stopping power in a compact package. Maintaining your Shield with genuine OEM parts ensures it continues to deliver the reliability and performance that made it one of America's most popular carry pistols.
Shipping & Legal Information
Domestic Shipping Only: This item ships within the United States only. No international shipping available.
Legal Compliance: Barrels are unregulated firearm parts and can be shipped directly to your door in most jurisdictions. However, you are responsible for ensuring compliance with all federal, state, and local laws in your area.
Need Help? We're Here for You
Questions about compatibility? Not sure if this barrel fits your specific M&P Shield variant? Our team specializes in Smith & Wesson parts and can help you identify the correct components.
📧 Email: sales@usagunsandgear.com
📞 Phone: 770-544-8075
⏰ Hours: Monday-Friday, 9 AM - 5 PM EST
Important: This is a replacement part only. Professional installation recommended. Always follow proper firearm safety procedures. Inspect and function-test after installation. Pre-owned parts sold as-is.