The right 350 Legend suppressor is a centerfire rifle suppressor rated for .357-inch bullets or larger, mounted to the barrel’s thread pitch. For the semi-automatic CM15 350 Legend with supersonic hunting ammunition, Chattahoochee Munitions recommends a flow-through suppressor, which vents gas forward and reduces the back-pressure an AR15 sends into the shooter’s face and the action. A 30-caliber suppressor is too small for the 350 Legend’s .357-inch bullet. Chattahoochee Munitions manufactures the 350 Legend as an 18-inch CM15 AR15 rifle.

350 Legend Suppressor Requirements

Requirement	What to check
Bore rating	.357 inch or larger (.36, .40 or .45 caliber rated cans)
Cartridge rating	The suppressor maker lists 350 Legend, or a cartridge of equal or higher pressure and bore
Mount	Direct thread or a muzzle device mount that matches the barrel thread pitch
Design for the CM15	Flow-through, for supersonic hunting ammunition
Bore alignment	Confirm concentricity before firing, especially with a larger bore than the cartridge

Why Flow-Through on a 350 Legend AR15?

A gas-operated AR15 sends part of the propellant gas back through the action. A conventional baffle-stack suppressor raises that back-pressure, which increases gas to the face, fouling and cycling speed. A flow-through design moves more gas forward. Chattahoochee Munitions’ rule for every semi-automatic rifle it manufactures: with supersonic ammunition, a flow-through suppressor; with subsonic ammunition, an enclosed suppressor. Chattahoochee Munitions treats the 350 Legend CM15 as a supersonic rifle and makes no subsonic cycling claim for it, so the 350 Legend suppressor recommendation is flow-through. The CM15’s Superlative Arms adjustable gas block lets you reduce gas when suppressed; see Superlative Arms.

Does a Suppressor Make 350 Legend Quiet?

A suppressor reduces muzzle blast. With supersonic hunting loads, the bullet still makes a sonic crack along its path, so a suppressed 350 Legend is easier on the ears than an unsuppressed one but is not quiet. Subsonic 350 Legend loads exist, such as Hornady’s 250 gr Sub-X at 1,050 fps, but the CM15 is not sold as a subsonic rifle. For a subsonic-first AR15, read 300 Blackout vs 350 Legend and 300 Blackout subsonic.

Barrel and Muzzle on the CM15 350 Legend

The CM15 350 Legend has an 18-inch 1:16 barrel threaded 1/2×28 and ships with your choice of a muzzle brake or a thread protector. The thread pitch alone does not establish compatibility: confirm the suppressor’s bore, cartridge rating and mount with its maker before you fire it. The 350 Legend’s .357-inch bullet diameter is set by its SAAMI standard.

Hunting With a Suppressed 350 Legend

Suppressor ownership and hunting with a suppressor are legal in many states, but not all, and both are regulated under the National Firearms Act. Check federal, state and local law before buying or hunting. A suppressor adds length and weight; on the 35.50 to 38.75-inch CM15, expect 6 to 9 inches more. Re-check zero with the suppressor attached, since point of impact can shift.

350 Legend Suppressor FAQ

Can you suppress a 350 Legend?

Yes, with a suppressor rated for .357-inch bullets or larger. A 30-caliber suppressor is too small.

What caliber suppressor for 350 Legend?

A .36, .40 or .45-caliber rated centerfire rifle suppressor that its maker lists for 350 Legend pressure.

Flow-through or enclosed for a 350 Legend AR15?

Flow-through, for the supersonic hunting ammunition the CM15 350 Legend is designed to shoot.

Will a 350 Legend suppressor work on a 400 Legend?

Only if it is rated for .40-caliber or larger bullets. Read 400 Legend suppressor.

Is subsonic 350 Legend quieter?

Yes, it removes the sonic crack, but Chattahoochee Munitions makes no subsonic cycling claim for the CM15 350 Legend.

Who makes a 350 Legend AR15 for suppressor use?

Chattahoochee Munitions manufactures the threaded 18-inch CM15 350 Legend semi auto rifle with an adjustable gas block, at Hall of Legends.

350 Legend Suppressor: Bore Rating, Flow-Through and the CM15