The Griffin Armament Bushwhacker 46 is the original universal suppressor, a .46 caliber can that handles rifle calibers from .22 up to .450 Bushmaster and .45-70 Government and pistol calibers up to .45 ACP (Griffin part no. GABUSH46-W). The current Gen 2 version uses patented ECO-FLOW baffles for lower back pressure and measures a compact 7.75 inches. A PLAN-A taper mount interface comes on the can, and a booster piston housing is in the box for tilt-barrel pistols. It suits a hunter running a .450 Bushmaster or a lever-action .45-70 who also wants a can for a .45 handgun.

Key Specifications

• The bore is .46 caliber, the diameter that gives the Bushwhacker its wide caliber range.
• Rifle calibers run from .22 up to .45-70 Government, with .450 Bushmaster and .458 SOCOM listed as well.
• Pistol calibers go up to .45 ACP, using the included booster piston housing on tilt-barrel pistols.
• Length is 7.75 inches, compact for a big-bore universal can.
• Diameter is 1.5 inches, the figure to check against a handguard.
• Weight is 15.8 ounces, light enough to carry in the field all day.
• Material is 17-4 H900 stainless steel, chosen for strength and heat resistance.
• Griffin lists it as full-auto rated, so it is built for sustained fire.
• Mounting options are EZ-LOK, HUB 1.375×24 and Taper Mount, which gives a wide choice of muzzle devices.
• The Ratchet-LOK end cap system lets you take the can apart for cleaning, which Griffin says resets weight and sound performance.

Frequently Asked Questions

What barrel length does the Bushwhacker 46 need? Griffin lists a 16-inch minimum barrel for .45-70, .450 Bushmaster and .458 SOCOM, with 12 inches for subsonic loads. It lists 9.5 inches for 5.56, 6 inches for .300 BLK, 8 inches for 6.8 SPC and 7.62×39, and 12.5 inches for .308 Winchester.

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.

What comes in the box? Griffin lists the tube body, the ECO-FLOW baffle system, the .46 caliber Ratchet-LOK end cap, the PLAN-A taper mount interface, the 1.375×24 booster piston housing with its retainer and spring, two Bushwhacker wrenches, a multi-function wrench and a suppressor pouch.

Buy the Griffin Armament Bushwhacker 46 Universal Suppressor, .46 Cal

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.