Silencer Saturday #405: SilencerCo Scythe STM

by Daniel Y

Published: November 8th, 2025

silencer saturday 405 silencerco scythe stm

Good afternoon everyone, and welcome back to TFB’s Silencer Saturday, brought to you by Yankee Hill Machine, manufacturers of the new Victra-12 shotgun suppressor. This week, we have a review of the SilencerCo Scythe STM. This is the big brother to the Scythe-Ti suppressor that adds some modularity and changes up the materials.

Silencer Saturday @ TFB:

History & Background

The Scythe series is the latest entrant in SilencerCo's hunting silencer lineage. Their first dedicated model was the Harvester. This .30-caliber can was 1.38 inches in diameter, 8.85 inches long, and weighed 11 ounces with a direct thread mount. It featured aluminum and stainless steel construction, and visually resembled the Octane pistol silencer with one major twist. The Harvester was the first SilencerCo suppressor to feature the Anchor Brake design. That brake works like other muzzle brakes to reduce felt recoil, but it sits on the front of the suppressor. SilencerCo also produced a .338-caliber Harvester Big Bore.

The Harvester Evo was an evolution (hence the name) of the design. It traded the traditional “tube full of baffles” layout for a tubeless design. The weight was similar but the overall dimensions were more nimble, with a 6.25-inch length and 1.57-inch diameter. Another difference was in the materials. The Evo combined Cobalt-6, Inconel, and 17-4 stainless steel to create a more robust suppressor than the original Harvester. It also omitted the Anchor Brake concept.

SilencerCo then introduced the Scythe-Ti, phasing out the Harvester line. The Scythe-Ti is a fully titanium design built for extreme light weight. At only 7.3 ounces, it still is rated for cartridges up to the .300 RUM. It continued the trend of shorter and fatter silencers, at 6.1 inches in length and 1.73 inches in diameter. It also incorporated a single chamber Anchor Brake, which is much shorter than the original multi-port design.

The Scythe STM is a further development on the Scythe-Ti design. It trades out the full titanium construction for 17-4 stainless steel, and has a two-piece body. The four baffles form a removable unit if the user wants a shorter and lighter setup than the full suppressor. In the short configuration it is one baffle shorter than the Scythe-Ti. The single-port Anchor Brake fits on both the short and long configurations.

Specifications

Here are the specs for the Scythe STM from SilencerCo's website:

Caliber Compatibility	.223 REM/5.56 NATO to .300 RUM
Accessories	Bravo
MSRP	$939
Weight	14.7 oz Long, 10.4 oz Short
Length	Long: 6.9″	Short: 5.1″ With Anchor Brake
Diameter	1.73″
Materials	17-4 SS
Muzzle Average	5.56 NATO: Long 127.4 dB, Short 132.8 dB, 300BLK: Long 119.2 dB, Short 126.1 dB, 308 WIN Long 128.6 dB, Short 134.1 dB, 300 WM Long 132.9 dB, Short 140.9 dB
Ships With	1 – 5/8 x 24 Bravo Direct Thread	1 – Spanner Wrench	1 – Bravo Multi-Tool	1 – Radial Tool	1 – Scythe Single Port Anchor Brake

Using my very specialized equipment, I weighed the Scythe STM and Scythe-Ti with the following results:

Scythe STM long configuration parts

Scythe STM, short configuration with anchor brake

Though the Scythe STM is really designed for bolt-gun use, that is not the only application where it is useful. By changing from titanium to stainless steel the suppressor is more able to handle fast rates of fire found on other types of guns. The STM uses HUB/Bravo accessories so it is compatible with various mounting systems for use on a wide range of guns.

Another difference between the Ti and STM is the price point. The Scythe-Ti has an MSRP of $1,174. Stainless steel is more affordable than titanium and the STM lists for $939. Despite the lower price point the included accessory list is the same (except that the 5/8x24 thread adapter is the standard model instead of the titanium version included with the Ti).

On The Range

The Scythe STM can pull duty on many types of rifles, but this is primarily a bolt action, hunting-type silencer. Most of my shooting has been on bolt guns, namely a Steyr Scout Mk II in .308 Winchester (side note: this is one heck of a gun and you should read about here and here) and Bergara B-14 HMR in .300 Win Mag. I have done most of my shooting with the Scout using the Scythe-Ti because it is such a natural fit on that gun, even including an NRL Hunter match with that setup.

Switching to the Scythe STM the feel is very similar. In the short configuration I could not really tell a difference in sound performance compared to the Scythe-Ti. The extra weight is identifiable on a lightweight gun like the Scout, particularly in the long configuration. And while the long configuration is quieter, the most noticeable change on the Scout was in recoil mitigation. Those extra baffles and the attendant extra weight did more to cut down on recoil and muzzle jump than the Scythe-Ti.

On the .300 Win Mag I only use the long configuration because the gun is already very long and heavy, and I want as much suppression as possible on a big magnum cartridge like that one. Once again, the sound performance seems very good. There is no Pew Science data for this suppressor yet, so the only numbers are manufacturer decibel ratings. SilencerCo claims 132.9 dB on a .300 Win Mag in the long configuration, and subjectively I would say that rating is believable. It takes both the head and shoulder aches out of shooting a magnum cartridge.

Conclusion

Both the Scythe-Ti and STM are compelling options. The ideal use case for the STM is a hunter who is not an extreme ultra-lightweight backcountry enthusiast, and who owns other guns that could make use of a .30-caliber can outside of hunting season. Fitted with a QD mount, the STM would be at home on a 5.56 AR-15 or even .300 Blackout setup. The added weight, even in the short configuration, is enough of a hit that guys who cut the handle off of their toothbrush to save grams will rightly opt for the titanium model. But if you are not obsessed with keeping it as light as possible, the STM offers a few more options while also being less expensive.

Thanks for joining us for Silencer Saturday. We’ll see you back here next week.