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This SilencerCo barrel is built to make your M&P 9mm suppressor-ready. It's precision machined from 416R stainless steel and finished in black nitride, giving it real durability against wear and corrosion. The 4.9-inch length works perfectly with the M&P platform, and the 1/2×28 threading is the standard mount for most 9mm suppressors on the market.
The barrel is engineered as a drop-in replacement that should fit cleanly into your M&P without requiring modifications, though some users have benefited from having a gunsmith verify thread alignment before mounting a suppressor. The 1:10 right-hand twist keeps bullets stable across the full range of 9mm ammunition you'd typically run through the gun, from lighter 115-grain training loads to heavier subsonic rounds.
The black nitride finish on 416R stainless steel means this barrel can handle repeated suppressor mounting, range use, and everything in between without the coating peeling or threads stripping. It'll look solid under hard use and hold its threading integrity through plenty of suppressor swaps. The construction is solid enough that SilencerCo stands behind the same quality standards they use for all their components.
The barrel ships with a thread protector that keeps things clean when you're not running a suppressor. You'll need a SilencerCo piston or equivalent to actually run a suppressor, which is sold separately and depends on which suppressor model you own.
This barrel is designed for the original M&P 1.0 platform. M&P 2.0 models may require some fitting or modification due to geometry changes Smith & Wesson made to the newer generation. Check with a gunsmith before ordering if you have an M&P 2.0 to confirm fitment.
You'll need a piston assembly that matches your specific suppressor model. The barrel itself is threaded and ready, but suppressors mount to pistons, and each suppressor type uses its own piston. The thread protector included keeps threads clean when you're not using a suppressor.
Yes, the 1:10 twist rate handles anything from standard 115-grain rounds to heavier 147-grain subsonic loads without stability issues. You can run whatever ammunition your M&P cycles reliably.
Nitride is a case hardening process that bonds to the steel itself, making it harder and more corrosion-resistant than traditional bluing. It holds up better to repeated suppressor mounting and doesn't peel or wear easily like some coatings.
| UPC | 816413020531 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | AC2023 |
| Barrel Length | 4.75'' |
| Caliber/Gauge | 9mm |
| Color | Black |
| Length | 4.75" |
| Model | |
| Package Height | 1.3 |
| Package Width | 1.3 |
| Product Type | Accessory-Barrels |
| Shipping Weight | 0.305 |
| Style | Threaded |
| Thread Pattern | 1/2"x28 |
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