Smith & Wesson M&P 40 Shield Barrel 3" .40 S&W Used Part 40S8
$69.99
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Smith & Wesson M&P 40 Shield Barrel 3" .40 S&W Used Part 40S8
$69.99
Smith & Wesson M&P 40 Shield 3" Barrel — .40 S&W | Part #40S8
This listing is for a genuine Smith & Wesson factory 3" barrel for the M&P 40 Shield chambered in .40 S&W. This is a used OEM part in good working condition — a cost-effective solution for gunsmiths and owners needing a reliable replacement without paying new part prices.
The barrel is the heart of your pistol's accuracy and reliability. Replacing a worn, damaged, or eroded barrel with a genuine OEM unit restores factory tolerances, proper headspacing, and consistent performance.
Part Details
- Part Number: 40S8
- Condition: Used — good working condition
- OEM: Genuine Smith & Wesson factory part
- Caliber: .40 S&W
- Barrel Length: 3"
- Includes: Barrel only — no sights, recoil spring, or slide components
Condition Notes
- ✓ Rifling intact and functional
- ✓ Chamber clean and properly dimensioned
- ✓ No cracks, bulges, or structural damage
- ✓ Locking lugs in good condition
- ✓ Bore clear and functional
- May show cosmetic wear (finish wear, holster marks) — does not affect function
Model Compatibility
| Model | Generation | Caliber | Barrel Length | Compatible |
|---|---|---|---|---|
| M&P 40 Shield | 1.0 | .40 S&W | 3" | ✓ Yes |
| M&P 40 Shield | 2.0 | .40 S&W | 3" | Verify fitment |
| M&P 9 Shield | Any | 9mm | — | ✗ No |
| M&P Shield Plus | Any | Any | — | ✗ No |
| M&P Shield EZ | Any | Any | — | ✗ No |
Caliber-specific part — .40 S&W only. Not compatible with 9mm, Shield Plus, or Shield EZ platforms.
Installation Notes
- Gunsmith installation recommended
- Full slide disassembly required
- May require minor fitting for optimal lockup
- Function-test after installation is mandatory
Questions? Contact our firearms parts experts at sales@usagunsandgear.com or call 770-544-8075.
No shipping outside the U.S. Pre-owned parts sold as-is.