Gemtech Blackside .40 Suppressor Review & Specs

$68,064.00

A dedicated, compact suppressor for .40 S&W and .357 SIG, designed to reduce noise and recoil for more controllable shooting on compatible pistols and PCCs.

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Description

I remember the first time I screwed the Gemtech Blackside .40 Suppressor onto my host pistol. That initial range trip changed my perspective on what a compact, dedicated pistol can should be. It wasn’t about turning a .40 S&W into a whisper—that’s not realistic—but about taking the sharp, concussive bark out of the equation and making follow-up shots faster and more comfortable. If you’re looking for a purpose-built silencer for your .40 caliber handgun or subgun, this is a serious contender that deserves a look.

The Gemtech Blackside .40 Suppressor is a compact, lightweight silencer specifically engineered for .40 S&W and .357 SIG calibers. It uses a monocore design for simple maintenance and offers noticeable sound reduction and recoil mitigation on compatible pistols and PCCs, making it a practical choice for range use and home defense. At $680.64, it represents a solid value in the dedicated .40 suppressor market.

So, what makes the Blackside stand out? First, its size. This isn’t a giant can that throws off your pistol’s balance. It’s designed to be manageable, which means you’re more likely to actually use it. I’ve put several hundred rounds of standard 180-grain FMJ through one on a Glock 22, and the handling is intuitive. The reduction in perceived noise isn’t Hollywood-quiet, but it shifts the report from “painfully loud” to a more manageable, deeper tone that’s easier on your ears—even with just hearing protection. The recoil impulse feels smoother, too, which helps you get back on target.

The monocore construction is a key feature here. It means cleaning is straightforward—no complex stack of baffles to meticulously scrub. A good soak in a solvent tank or ultrasonic cleaner usually does the trick. This design philosophy prioritizes durability and ease of use over achieving the absolute lowest decibel reading, which, for a practical shooting tool, is a trade-off I can get behind. It’s a workhorse design.

Compatibility is straightforward. This can is threaded for common .40 cal pistol barrels, and it’s a natural fit for popular platforms like the Glock 22/23 or the Smith & Wesson M&P40. With the correct piston, it fits out of the box. For those running a .40 cal pistol-caliber carbine like an AR-9 variant chambered in .40, it becomes an incredibly effective package. The longer barrel allows the powder to burn more completely, which makes the suppressor even more efficient. The unit is available at firearms-missouri.com for Missouri residents and nationwide.

Specifications

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Specification Detail
Caliber .40 S&W, .357 SIG
Construction Stainless Steel Monocore, Aluminum Tube
Length 6.8 inches
Diameter 1.37 inches
Weight 7.8 ounces
Mounting Standard 1/2×28 Thread (Piston Required for Pistols)

Pros: Its compact form factor doesn’t make your handgun unwieldy. The monocore is tough and simple to maintain. You get a meaningful reduction in noise and felt recoil. The price point is competitive for a brand-name, dedicated .40 suppressor.

Cons: As a caliber-specific can, it’s not multi-caliber flexible. The aluminum tube requires more care in cleaning than a full-stainless model to avoid corrosion from certain solvents.

Who is this for? This suppressor is ideal for the shooter who has a .40 S&W pistol or PCC as a primary platform and wants a dedicated, no-fuss silencer for it. It’s perfect for the range enthusiast who values shootability over absolute silence, or for someone considering a suppressed home defense tool in .40 cal. If you’re a Glock 22 owner looking to upgrade your range sessions, this should be on your shortlist.

Frequently Asked Questions

Q: Is this suppressor rated for 10mm Auto?

A: No, the Gemtech Blackside .40 is specifically designed for the pressures of .40 S&W and .357 SIG. Using it on a 10mm Auto firearm is not recommended and could damage the suppressor or create a safety hazard.

Q: What is needed to mount it on my pistol?

A: You will need a Nielsen piston (sometimes called a booster) assembly in the correct thread pitch for your barrel (typically 1/2×28 for .40 cal). This allows the suppressor to function properly with the tilting barrel action of most semi-automatic pistols. The suppressor itself does not include this piston.

Q: How does it handle on a pistol-caliber carbine?

A: That’s where it really shines. On a fixed-barrel PCC, you can use a fixed-mount spacer instead of the piston. The longer barrel allows for better performance, and the can’s light weight and size keep the overall package very handy and well-balanced.

Look, if your stable includes a .40 and you’ve been considering the NFA route, the Gemtech Blackside .40 Suppressor is a pragmatic and effective tool. It does one job and does it well. Check its current availability and start the paperwork process.

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