SilencerCo Scythe STM Modular Centerfire Rifle Silencer .223 Rem/5.56 Nato to .300 RUM

The SilencerCo Scythe STM is a modular centerfire rifle silencer engineered to handle calibers from .223 Remington all the way up to .300 RUM, making it one of the most versatile suppressors on the market. Built from 17-4 stainless steel, this suppressor gives you the flexibility of two different configurations—a longer tube for maximum sound reduction or a shorter version for maneuverability on tighter platforms. Whether you're running a precision .308 Winchester setup, a speedy .300 Blackout, or anything in between, the Scythe STM adapts to your rifle and your mission.

Modularity is the core strength here. The Scythe STM ships with a 5/8×24 Bravo Direct Thread adapter, meaning you can get it on your rifle quickly. The included Scythe Single Port Anchor Brake gives you another attachment option, and the supplied spanner wrench, Bravo multi-tool, and radial tool make installation and maintenance straightforward. At 14.7 ounces in long configuration and 10.4 ounces in short, the Scythe STM won't bloat your rifle's handling characteristics, while the 1.73-inch diameter keeps it sleek under typical rifle handguards.

Sound signature matters on the range and in the field. The long tube delivers 127.4 dB on 5.56 NATO and dips to 119.2 dB on subsonic .300 Blackout—genuine hearing-safe performance for both supersonic and subsonic loads. Push the same .300 Blackout through the short tube and you're at 126.1 dB, trading a touch of suppression for a more compact package. Whether you're hunting, running precision drills downrange, or testing loads at the bench, you'll appreciate the flexibility to choose your configuration based on what your application demands.

This is a serious suppressor for serious shooters who don't want to buy three cans to cover their entire rifle roster. The Scythe STM does the heavy lifting across a genuine range of calibers without forcing you to compromise on build quality or sound performance.

Key Features

• Modular design with long (6.9") and short (5.1") tube configurations
• Covers .223 Rem / 5.56 NATO through .300 RUM in a single suppressor
• 17-4 stainless steel construction for durability and corrosion resistance
• Compact 1.73" diameter fits standard rifle handguards
• 5/8×24 Bravo Direct Thread adapter included for quick installation
• Proven sound performance: 127.4 dB on 5.56 NATO (long), 119.2 dB on .300 Blackout (long)
• Complete toolkit included: spanner wrench, Bravo multi-tool, radial tool, and Scythe Single Port Anchor Brake

Specifications

Frequently Asked Questions

What calibers does the Scythe STM suppressor work with?

The Scythe STM is rated for centerfire rifle calibers from .223 Remington and 5.56 NATO on the small end all the way through .300 RUM on the large end. That range covers the majority of popular hunting and tactical calibers, including .308 Winchester, .300 Blackout, .300 Win Mag, and everything in between.

Does it come with everything I need to install it?

Yes. The Scythe STM ships with a 5/8×24 Bravo Direct Thread adapter for immediate attachment to a compatible rifle, plus a spanner wrench, Bravo multi-tool, radial tool, and a Scythe Single Port Anchor Brake—everything you need to mount and maintain the suppressor.

What's the difference between the long and short configurations?

The long tube measures 6.9 inches and weighs 14.7 ounces, delivering maximum sound suppression (for example, 127.4 dB on 5.56 NATO). The short tube is 5.1 inches and 10.4 ounces, trading some suppression for a more compact, maneuverable package. You can reconfigure between the two as your application changes.

Will this silencer fit under my rifle handguard?

At 1.73 inches in diameter, the Scythe STM is designed to fit within typical rifle handguards. However, you should verify clearance with your specific rifle setup before purchase, as handguard dimensions vary widely.