The Griffin Revolution 45 MOD 4 is a modular-length .45 caliber pistol suppressor that reconfigures between a short and a full-size length without tools (brand part no. GAREV45M4W). Griffin Armament built the original Revolution 9 and 45 as the first modular-length pistol silencers, and the MOD 4 is a full redesign that is easier to mount, configure and take apart. Patented CARBON-GARD baffles use high-temp silicone O-rings at every interface to seal gas and carbon inside the stack, so the core does not lock into the tube. A permanently installed booster housing ships with an EZ-LOK piston. It suits .45 ACP pistol owners and subsonic big-bore carbine shooters.

Key Specifications

• Griffin rates it for pistol and subsonic calibers with projectiles .458 or smaller, such as .45 ACP and .45-70 Government.
• Length is 6.56 inches short or 8.81 inches full size, set by the tool-less forward extension.
• Weight is 10.2 ounces short or 13.3 ounces full size.
• Diameter is 1.375 inches, a standard pistol-can profile.
• Materials are 17-4 H900 stainless baffles in a 7075-T6 aluminum tube and end cap.
• The stack holds nine CARBON-GARD baffles, and Griffin lists the can as user serviceable.
• It is full-auto rated for 60 rounds before cooling within Griffin’s stated caliber and velocity limits.

Frequently Asked Questions

How does it mount? It ships with an EZ-LOK piston, which needs an EZ-LOK barrel adapter sold separately. Griffin also lists 3-Lug, Taper Mount and fixed barrel options.

Is there a minimum barrel length? Griffin states there are no minimum length restrictions for .45 caliber and subsonic calibers, though longer barrels extend service life.

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 Griffin Armament Revolution 45 MOD 4 Suppressor, .45 Caliber

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 Griffin Armament‘s silencers and suppressors lineup and our Lubbock, Texas team will handle the transfer, and it ships fast from Lubbock to your Class 3 dealer.