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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 Pistol Suppressor Piston is designed specifically for .45 ACP firearms, utilizing the M16x1 left-hand threading for a secure fit. This piston optimizes the function of your suppressor by ensuring proper alignment and gas management, which can enhance the overall shooting experience by reducing recoil and sound signature. These pistons are commonly found in builds that prioritize quiet operation and smooth performance, particularly in tactical or competitive shooting setups.
Specifications
Pistol Suppressor Pistons - Suppressor Piston 45 Auto M16x1LH
Available Merchants(5)
Prices checked
Price Alert
Price and stock
Availability is good for the SIG Sauer Pistol Suppressor Pistons - Suppressor Piston 45 Auto M16x1LH: it was in stock at one retailer or another nearly every day in September 2026, and today 4 of the 5 retailers we track have it in stock. It dipped to $113.33 at KY Gun Company for a stretch in September 2026, well under its usual $126.87 to $130.99, so sales do come around. Buying today, the lowest price is $112.84 at BattleHawk Armory, which matches the best price we saw in September.
Prices checked · refreshed daily across 37 retailers
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