YHM Fat Cat 5.56 Suppressor | sRx Mount

The Yankee Hill Machine Fat Cat is a compact suppressor designed for 5.56 NATO use and supplied with the Mini sRx mount. It combines a 17-4 PH stainless steel body and a heat-treated 718 Inconel blast baffle to deliver a durable, full-auto-rated design for rigorous use. The unit’s larger 1.94″ diameter increases internal volume for a lower tonal signature, and it carries a published average muzzle pressure of 141 dB. The Fat Cat’s overall length measures 4.50 inches with the sRx adapter installed, making it a short-profile option in its class.

Product Specifications

• The caliber is 5.56 NATO.
• The suppressor body is constructed from 17-4 PH stainless steel with a heat-treated 718 Inconel blast baffle.
• The finish is Black Nitride.
• The thread pattern is 1/2×28.
• The overall length measures 4.50 inches with the sRx adapter installed.
• The body length without adapter measures 4.25 inches.
• The outer diameter is 1.94 inches.
• This suppressor is rated for full-auto use.
• The mount included is the Mini sRx Mount with 1-3/8-24 HUB interface.
• The published average sound pressure level at the muzzle is 141 dB.
• Minimum barrel length for 5.56 NATO is 10 inches.
• The product UPC is 841812101776.

Designed for shooters who value a compact, serviceable suppressor, the Fat Cat pairs robust metallurgy with a short profile and an sRx mounting system for straightforward attachment. Its construction and reported decibel performance make it suitable for precision-oriented rifle setups and training sessions where a lower report and reliable full-auto capability are desirable. The Fat Cat presents a balanced option for operators seeking a durable, compact 5.56 suppressor built from proven materials.

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