The best 375 Raptor suppressor setup starts with subsonic ammunition. A 400 gr 375 Raptor subsonic bullet never breaks the sound barrier, so a suppressor removes most of the report and there is no supersonic crack downrange. Chattahoochee Munitions manufactures the PLACID 375 and PLACID OTB suppressors, 400 gr subsonic and 190 gr supersonic ammunition, and the CM7S bolt action and CM10 semi-automatic firearms that fire it, so every recommendation here comes from one complete suppressed system. The 375 Raptor was designed by Arne Brennan, and short-barrel subsonic shooting is where it shines.
375 Raptor Suppressor Recommendations at a Glance
| Firearm | Ammunition | Recommended 375 Raptor suppressor |
|---|---|---|
| CM7S bolt action | 400 gr subsonic | Enclosed |
| CM7S bolt action | 190 gr supersonic | Enclosed |
| CM10 semi-automatic | 400 gr subsonic | Enclosed |
| CM10 semi-automatic | 190 gr supersonic | Flow-through |
These are Chattahoochee Munitions recommendations, not compatibility rules. Whatever you choose, the suppressor must be rated by its manufacturer for .375 caliber, your barrel length, and your ammunition.
Why 375 Raptor Subsonic Is Made for a Suppressor
A suppressor works on the expanding propellant gas at the muzzle. It cannot do anything about the ballistic shock wave of a supersonic bullet, which cracks along its whole flight path. Subsonic ammunition removes that crack, which is why subsonic is the heart of suppressed shooting.
The 375 Raptor is made for it. Below the speed of sound, energy comes from bullet weight, and the 375 Raptor’s .375-inch bore accepts a 400 gr bullet. The Chattahoochee Munitions 400 gr Maker REX load averages about 1,016 fps from a 12.5-inch barrel, with roughly 917 ft-lb at the muzzle and about 842 ft-lb at 100 yards. At that velocity it stays subsonic even on a 0°F morning. See 375 Raptor subsonic for the full story.
Enclosed or Flow-Through: Choosing a 375 Raptor Suppressor by Platform
Bolt action (CM7S): always enclosed. A bolt action does not cycle when it fires, so the only sound left is what escapes the muzzle. Chattahoochee Munitions recommends an enclosed suppressor on the CM7S with both subsonic and supersonic ammunition, paired with the 400 gr subsonic load for suppressed shooting.
Semi-automatic (CM10) with subsonic: enclosed. Subsonic loads run at lower pressure, so an enclosed suppressor is recommended. The CM10’s Superlative Arms adjustable gas block and Odin Works adjustable buffer let it be tuned to run suppressed.
Semi-automatic (CM10) with supersonic: flow-through. Full-pressure supersonic loads push more gas back into a gas-operated action. A flow-through suppressor vents more of that gas forward, which is why it is the recommended 375 Raptor suppressor for supersonic shooting in the CM10.
For a deeper platform comparison, read 375 Raptor bolt action vs semi-auto.
PLACID 375: The Chattahoochee Munitions 375 Raptor Suppressor
The PLACID 375 is the muzzle-mounted 375 Raptor suppressor Chattahoochee Munitions manufactures for its 375 Raptor firearms, and it is rated from 5.56 NATO through .375. It is an enclosed suppressor, so it is the recommended choice for the CM7S with any ammunition and for the CM10 with subsonic ammunition. For supersonic ammunition in the CM10, choose a flow-through suppressor rated for .375 caliber.
- Body: fully welded 17-4 stainless steel, 11 baffles
- Length: 8.25 inches
- Diameter: 1.5 inches
- Weight: 16.9 oz
- Mounting: HUB-compatible interface, with an included 11/16×24 titanium direct-thread mount
- End cap: titanium .375
Every Chattahoochee Munitions 375 Raptor barrel is threaded 11/16×24, so the included direct-thread mount fits out of the box. The HUB interface also lets you choose other HUB-compatible mounts later; confirm any alternate mount with its maker for your suppressor, firearm, and cartridge.
PLACID OTB: A Short Suppressed 375 Raptor
A muzzle-mounted suppressor adds its full length past the muzzle. The PLACID OTB takes a different approach on the 12.5-inch CM7S. Its all-titanium 12.5-inch reflex tube extends back over the barrel, and only the 5-inch 3D-printed titanium baffle stack sits forward of the muzzle. The suppressor is 17.25 inches long, 1.5 inches in diameter, and weighs 23.6 oz, yet most of it surrounds the barrel. The complete CM7S 375 Raptor with PLACID OTB weighs 7 lb 13.6 oz. For a short, quiet, suppressed bolt action, this is a compact 375 Raptor suppressor setup from Chattahoochee Munitions.
Barrel Length, Twist Rate, and the Suppressed 375 Raptor
A 12.5-inch barrel delivers the full performance of the 400 gr subsonic load, and it keeps a suppressed 375 Raptor close to the length of an unsuppressed 16-inch rifle. A 16-inch barrel avoids SBR registration and favors the 190 gr supersonic load, at the cost of a longer suppressed package. See 375 Raptor barrel length for every configuration.
Stability matters behind a suppressor, because a marginally stable bullet can yaw as it leaves the muzzle. Every Chattahoochee Munitions 375 Raptor barrel is made by Mos-Tek from 416R stainless steel with 5R rifling and a 1:8 twist, finished in E100 Blackout Cerakote. That twist gives the 400 gr bullet a wide margin over Maker Bullets’ 1:11 guidance. Read 375 Raptor twist rate for the details.
Caliber Rating and Mounting
Bore diameter alone does not make a suppressor compatible. Choose a 375 Raptor suppressor that its manufacturer rates for .375 caliber and for your barrel length, and follow its mounting requirements, whether that is direct thread, a muzzle device, or a HUB-compatible mount.
What About Other .375-Caliber Suppressors?
Other manufacturers offer suppressors rated for .375-caliber cartridges. Chattahoochee Munitions has not independently tested their claims, so review each maker’s current ratings, barrel-length restrictions, and mounting requirements. Published sound figures depend on the ammunition, firearm, barrel length, and test method, so a number measured on one setup should not be assumed for another.
Choosing a 375 Raptor Suppressor for Hunting
For suppressed hunting, judge the suppressor as part of the whole rifle: overall length, total weight, and balance all change how it carries into a stand or through brush. A short 12.5-inch firearm with subsonic ammunition and an enclosed suppressor suits deer and hogs at known, moderate distances. Suppressor ownership and hunting with a suppressor are governed by federal, state, and local law, so check the rules where you hunt. Read 375 Raptor hunting for guidance by game and distance.
Suppressed Does Not Mean Silent
No firearm is truly silent, and Chattahoochee Munitions does not call any suppressed firearm hearing safe. A suppressor reduces muzzle blast, but the action, the bullet’s impact, and the environment still make noise. NIOSH recommends hearing protection when shooting or hunting, even with a suppressor.
Suppressed 375 Raptor Firearms
Chattahoochee Munitions manufactures complete 375 Raptor firearms ready for a suppressor:
- CM7S 12.5-inch bolt action with PLACID OTB
- CM7S 12.5-inch bolt action SBR or pistol
- CM10 12.5-inch semi-automatic SBR
- CM7S 16-inch bolt action rifle and CM10 16-inch semi-automatic rifle
Pair them with 400 gr subsonic for bolt action or 400 gr subsonic for semi-auto, and browse every configuration in the Raptor Paddock.
PLACID Suppression Guides
- PLACID Suppression
- Reflex suppressor
- Direct thread vs HUB mount
- Titanium vs stainless suppressor
- Suppressed bolt action rifle
375 Raptor Suppressor FAQ
What is the best 375 Raptor suppressor?
One rated for .375 caliber and matched to your platform: enclosed on a bolt action, enclosed on a semi-auto with subsonic ammunition, and flow-through on a semi-auto with supersonic ammunition. Chattahoochee Munitions offers the enclosed PLACID 375 and, on the 12.5-inch CM7S, the PLACID OTB.
Who makes a 375 Raptor suppressor?
Chattahoochee Munitions manufactures the PLACID 375 and PLACID OTB suppressors along with CM7S and CM10 375 Raptor firearms and 375 Raptor ammunition.
Should I use an enclosed or flow-through suppressor on a 375 Raptor?
Enclosed on the CM7S bolt action with any ammunition, and on the CM10 semi-auto with subsonic. Flow-through is recommended on the CM10 with supersonic ammunition.
Can you suppress a 375 Raptor?
Yes, with a suppressor its manufacturer rates for .375 caliber, your barrel length, and your ammunition. Every Chattahoochee Munitions 375 Raptor barrel is threaded 11/16×24.
Is subsonic 375 Raptor silent with a suppressor?
No firearm is silent. Subsonic ammunition removes the supersonic crack and the suppressor reduces muzzle blast, but other sounds remain. Use hearing protection.
Is a suppressed 375 Raptor bolt action quieter than a semi-auto?
Yes. A bolt action does not cycle when it fires, so with subsonic ammunition and an enclosed suppressor it adds no action noise and vents no gas at the chamber.
What barrel length is best for a suppressed 375 Raptor?
12.5 inches. It delivers the full performance of the 400 gr subsonic load and keeps the suppressed firearm short. The PLACID OTB shortens it further by wrapping the suppressor around the barrel.
How much does the PLACID 375 weigh?
16.9 oz. It is 8.25 inches long and 1.5 inches in diameter, with a fully welded 17-4 stainless steel body and 11 baffles.
Is the PLACID 375 an enclosed suppressor?
Yes. The PLACID 375 is an enclosed suppressor, recommended on the CM7S bolt action with any ammunition and on the CM10 semi-auto with subsonic ammunition.
Is the PLACID 375 HUB compatible?
Yes. It uses a HUB-compatible mounting interface and includes an 11/16×24 titanium direct-thread mount.
Does a 375 Raptor suppressor reduce recoil?
A suppressor can change felt recoil by managing propellant gas and adding weight at the muzzle, but the effect depends on the full combination of firearm, ammunition, and suppressor.
Who designed the 375 Raptor?
The 375 Raptor was designed by Arne Brennan. Chattahoochee Munitions manufactures 375 Raptor firearms, suppressors, and ammunition.