The Yankee Hill Sidewinder M2 .45 ACP pistol suppressor is a lightweight, serviceable handgun can on a .578×28 piston mount (brand part no. YHM-2070-28). Yankee Hill Machine builds it from 7075-T6 aluminum and 17-4 PH stainless steel, which keeps it under 11 ounces even with the piston installed. Ten index points let you adjust point of impact without removing the can, and the redesigned rear cap allows tool-free piston swaps. The Nielsen device keeps a recoil-operated pistol running reliably. It is a practical choice for a .45 owner who wants a suppressor that can also move to a subsonic .300 Blackout rifle.

Key Specifications

• Caliber is .45 ACP, sized for .45 caliber pistols.
• The mount is a .578×28 piston, the common thread on threaded .45 ACP barrels.
• Weight is 9.4 ounces, or 10.6 ounces with the piston.
• Length is 9.2 inches, or 9.35 inches with the piston.
• Diameter is 1.375 inches, slim enough to clear most pistol sights.
• Construction is 7075-T6 aluminum and 17-4 PH stainless steel, light where it can be and steel where it must be.
• 10 index points let you adjust point of impact while the can stays on the pistol.
• A tool-free rear cap lets you swap pistons without tools.
• YHM publishes a sound rating of 133 dB.
• It is full-auto rated and made in the USA.

Frequently Asked Questions

Can I adjust point of impact with it mounted? Yes. The Sidewinder M2 has 10 index points, so you can tune point of impact while the can stays attached to the host firearm.

Will it work on a .300 Blackout rifle? YHM says it can be used with subsonic .300 BLK on a barrel of 7.5 inches or longer.

Do I need ATF approval to buy this? No. As of October 9, 2026, ATF no longer requires Form 4 approval, registration or a tax stamp for suppressors. It transfers on a Form 4473 with a background check through a Class 3 (SOT) dealer. State and local laws still apply.

Buy the Yankee Hill Machine Sidewinder M2 .45 ACP Pistol Suppressor

As of October 9, 2026, this suppressor transfers on a Form 4473 with a background check at your Class 3 (SOT) dealer, with no Form 4 or tax stamp; state and local laws still apply. Order through Yankee Hill Machine‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will handle the transfer.