The SilencerCo Scythe-STM is a stainless-steel, modular centerfire rifle suppressor rated through .300 RUM. It offers short and long configurations for a balance of weight and suppression and ships with Bravo direct thread and anchor brake accessorie
The SilencerCo Scythe-STM is a modular centerfire rifle suppressor engineered for durability and consistent performance. The STM is the stainless-steel member of the Scythe family, offering full-auto rating with no barrel restrictions and configurable short and long lengths. It ships with a 5/8×24 Bravo direct thread mount, tools for maintenance, and a single-port anchor brake. Typical applications include hunting and precision long-range rifle shooting.
Product Specifications
The model is Scythe STM manufactured by SilencerCo.
The manufacturer’s part number is SU5421.
The caliber compatibility is .223 REM/5.56 NATO to .300 RUM.
The NFA attachment method is Direct Thread.
The included thread pattern is 5/8×24.
The suppressor material is listed as 17-4 SS (stainless steel).
The finish is listed as Black with an applied finish type.
Overall length is listed as 5.1″ (Short) to 6.9″ (Long).
The outside diameter is 1.73 inches.
The weight is listed in product text as Short 10.4 oz; Long 14.7 oz.
The product ships with 5/8 x 24 Bravo Direct Thread, Spanner Wrench, Bravo Multi-Tool, Radial Tool, and Scythe Single Port Anchor Brake.
Representative muzzle averages include 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.
The product type/subcategory is Suppressor / Suppressors.
The ATF model designation is SCYTHE – STM.
The UPC is 816413028483.
The Scythe-STM provides a durable, modular option for shooters who need a robust stainless-steel suppressor. Its short and long configurations let users trade length and weight against maximum suppression, and the included Bravo direct thread mount and tools support common attachment and maintenance needs. For hunters and precision shooters who require a full-auto rated, hard-use-capable suppressor, the Scythe-STM delivers practical features without unnecessary complexity.
Disclaimer: Our e-commerce site uses stock images for item photography. In most cases, these are completely accurate however there are some cases where the image may not wholly reflect the item being purchased. It is your responsibility to verify the UPC of the item you are purchasing from us with the manufacturer to confirm you are placing an order for the correct item.
