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Plan your Class 3 dealer
Suppressors go through a Class 3 (SOT) dealer. The federal tax is $0, and ATF stopped enforcing the Form 4 wait on October 9, 2026, but some states still require federal registration. You still pay the dealer's transfer fee.
Sig Sauer
Overview
The Sig Sauer Suppressor Piston is designed specifically for .40 S&W firearms and features a direct thread mount type, allowing for a secure attachment to your suppressor. This piston ensures optimal performance and reliability when using your suppressor with .40 caliber ammunition, enhancing your overall shooting experience. This product is commonly used in builds focused on reduced noise and recoil while maintaining accuracy during both competitive shooting and tactical applications.
Specifications
Pistol Suppressor Pistons - Suppressor Piston 40 S&W 9/16x24 Tpi
Price and stock
The SIG Sauer Pistol Suppressor Pistons - Suppressor Piston 40 S&W 9/16x24 Tpi was out of stock everywhere we track for all of September 2026, and today none of the 2 retailers we track has it in stock right now. Listed prices start at $48 at Brownells for when it comes back.
Prices checked · refreshed daily across 37 retailers
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