Midwest Mi-Mb10 .357 Muzzle Brk 5/8-24

The Midwest Industries Mi-Mb10 .357 muzzle brake is a two-chamber recoil reducer built for lever-gun shooters who want to tame muzzle rise without adding bulk. If you run a Marlin or Henry chambered in .357 Magnum and spend time at the range or in the field, this brake cuts climb noticeably while keeping sight picture recovery fast—a real advantage in follow-up shots. The two-chamber design handles the mid-range energy of .357 rounds intelligently, managing gases to reduce climb without the aggressive flash signature or concussion of some brakes.

Built from tool steel and finished with a phosphate coat, the Mi-Mb10 is made to last through years of shooting and cleaning. It's made in the USA and threads on with a standard 5/8-24 connection, the same pitch found on most lever-gun barrels. The brake weighs just 4 ounces, so it won't throw off your rifle's balance. Installation is straightforward for a gunsmith, though we always recommend having a pro verify your barrel's thread pitch and bore diameter before you buy—getting those details right is critical to safe, reliable performance.

This is not a suppressor—it's a muzzle brake designed to reduce felt recoil and muzzle climb by redirecting gases. The .410" bore diameter is sized for .357 caliber rifles, so confirm your rifle's specs before ordering. Midwest Industries includes a new crush washer with the brake for a proper seal at the shoulder.

Key Features

• Two-chamber design reduces muzzle climb and recoil
• Sized for .357 caliber rifles with .410" bore diameter
• 5/8-24 thread pitch (standard for lever guns)
• Tool steel construction with phosphate finish for durability
• Just 4 ounces—minimal weight penalty
• Made in the USA
• Includes crush washer for installation

Specifications

Frequently Asked Questions

Will this fit my Marlin or Henry lever gun in .357?

The Mi-Mb10 is designed for .357 caliber lever guns and uses a 5/8-24 thread pitch, which is standard for many Marlin and Henry models. However, always confirm your barrel's thread pitch and bore diameter with the manufacturer or a gunsmith before purchase—using the wrong brake is unsafe and can damage your rifle.

What's the difference between this muzzle brake and a suppressor?

This is a muzzle brake, not a suppressor. It reduces recoil and muzzle climb by redirecting gases, but it does not reduce sound signature. A suppressor requires a tax stamp and federal registration under the NFA; this brake does not.

Do I need a gunsmith to install it?

Yes, we recommend professional installation by a certified gunsmith. They'll verify that your barrel's thread pitch and bore diameter are correct and that the brake is properly timed and torqued. Incorrect installation can cause accuracy problems or unsafe operation.

What's included in the box?

The Midwest Industries Mi-Mb10 comes with a new crush washer, which is used during installation to ensure a proper seal between the brake and barrel shoulder.