CM7S 308 Win 16″ Lightweight Bolt Action Rifle – Black Tungsten

CM7S 308 Suppressor Ready Rifle

The CM7S 308 Suppressor Ready Rifle combines a compact 16-inch Mos-Tek barrel, 5/8×24 muzzle threads and CM’s three-lug bolt action with a Black Tungsten billet-aluminum chassis. It is configured for conventional supersonic 308 Winchester ammunition and provides a strong foundation for an appropriately rated enclosed suppressor.

A bolt action does not depend on propellant gas to cycle its action. That allows this rifle to use an enclosed suppressor without increasing bolt speed or disrupting a semi-automatic gas system. The chamber remains closed until the shooter manually operates the bolt, helping contain action noise and gas during suppressed use.

Explore the complete CM firearm, ammunition, magazine and technical-guide family in District 308.

Mos-Tek 308 Winchester Barrel

The 16-inch barrel is produced through CM’s collaboration with Mos-Tek. It is machined from 416R stainless steel with 5R rifling and receives E100 Blackout Cerakote for external protection.

A 1:8 twist supports conventional supersonic 308 Winchester projectile weights. The shouldered crown protects the muzzle, while the 5/8×24 threads accept compatible direct-thread suppressors, suppressor mounts and other muzzle devices.

This barrel is not intended for CM’s 300-grain subsonic ammunition. That 2.06-inch projectile requires the 1:5 twist found in CM’s specialized 12.5-inch subsonic firearms.

Barrel Specifications

• Manufacturer collaboration: CM and Mos-Tek
• Chambering: 308 Winchester
• Barrel length: 16 inches
• Material: 416R stainless steel
• Rifling: 5R
• Twist rate: 1:8
• Crown: Shouldered crown
• Muzzle threads: 5/8×24
• Barrel attachment: Remage barrel nut
• Finish: E100 Blackout Cerakote

CM7S Three-Lug Bolt Action

The CM7S action uses the established Remington 700 footprint with a three-lug bolt and 60-degree throw. The shorter bolt rotation reduces handle travel and provides additional clearance around the optic during operation.

A one-piece .718-inch bolt body, M16-style extractor and integrated .300-inch recoil lug provide the mechanical foundation of the 308 Suppressor Ready Rifle. Wire EDM-cut raceways establish uniform tolerances, while the oversized bolt knob and spiral-fluted bolt support smooth manual operation.

The action and bolt receive a full PVD coating for corrosion resistance and reduced operating friction. A pinned 20-MOA Picatinny rail provides a stable optic interface, and the large ejection port offers clear access to the chamber and action.

CM7S Action Features

• Remington 700 footprint
• Three-lug action with a 60-degree bolt throw
• M16-style extractor
• One-piece bolt with a .718-inch bolt-body diameter
• Spiral-fluted bolt
• Wire EDM-cut raceways
• Pinned 20-MOA Picatinny optic rail
• Large ejection port
• Lightened action body
• Approximately 25-ounce action weight
• .062-inch firing pin compatible with small-rifle-primer brass
• Integrated .300-inch recoil lug
• Tool-less fire-control removal
• Remington 700 trigger compatibility
• 1-1/16-inch-16 barrel thread pitch
• Side bolt-stop release
• Oversized bolt knob
• Full PVD coating

TriggerTech Remington 700 Primary Trigger

The CM7S uses a TriggerTech Remington 700 Primary trigger, available with a flat or curved trigger bow. TriggerTech’s Frictionless Release Technology provides a zero-creep break with short overtravel and consistent operation.

Pull weight is externally adjustable from 1.5 to 4 pounds in one-ounce increments. Hardened 440C stainless steel internal components provide corrosion resistance and extended service life. Current flat triggers do not use the removable trigger shoes shown in some earlier CM product photographs.

Black Tungsten CM7S Chassis

The chassis is machined from a single block of billet aluminum and finished in Black Tungsten Cerakote. Black and Black Tungsten stock components complete the darker presentation of this 308 Suppressor Ready Rifle.

The flared magazine well accepts compatible short-action AICS-pattern magazines. An ambidextrous magazine release permits operation from either side, while the enlarged trigger guard provides additional clearance when gloves are worn.

The full bottom ARCA rail supports compatible tripods, bipods and other supported-position equipment. M-LOK mounting surfaces provide additional accessory space, and dual integrated QD sockets supply sling attachment points on both sides of the chassis.

Chassis and Stock Features

• Billet-aluminum construction
• Black Tungsten Cerakote chassis
• Black and Black Tungsten stock components
• Flared short-action AICS-pattern magazine well
• Ambidextrous magazine release
• Large trigger guard for gloved operation
• Accepts AR15 pistol grips without an integrated dovetail
• Modular single-bolt stock-adapter system
• Telescoping stock
• Adjustable cheek riser
• M-LOK compatibility
• Dual integrated QD sling sockets
• Full bottom ARCA rail

CM Vertical Crossover Grip

The rifle uses the CM Precision Vertical Crossover Grip developed in collaboration with MK Machining. Its geometry supports a more vertical firing-hand position while retaining practical handling for field carry and positional use.

Suppressor Selection for This 308 Rifle

CM generally recommends an enclosed suppressor for a bolt-action 308 Winchester rifle. Because the action is operated manually, suppressor backpressure does not have to be balanced against semi-automatic bolt speed, extraction or receiver gas.

The suppressor must be rated for 308 Winchester, the firearm’s barrel length and the intended firing schedule. Confirm muzzle-device compatibility, suppressor-to-bore alignment and all manufacturer restrictions before firing.

The 308 Suppressor Guide explains why CM recommends enclosed suppressors for bolt actions, flow-through suppressors for supersonic CM10 rifles and enclosed suppressors for the specialized CM10 SUBSONIC.

308 Winchester Ammunition Compatibility

This 1:8 twist 308 Suppressor Ready Rifle is intended for conventional supersonic 308 Winchester ammunition. CM 308 Winchester firearms can also use appropriate 7.62×51 NATO ammunition.

The cartridges are closely related, but their published pressure values are derived through different testing methods and should not be treated as universally interchangeable across every firearm. Read the 308 Winchester vs 7.62 NATO Guide for CM’s complete compatibility explanation.

Do not use CM 300-grain subsonic ammunition in this rifle. That ammunition requires a 1:5 twist barrel and should not be fired through this 1:8 twist configuration, particularly with a suppressor attached.

AICS Magazine Compatibility

The CM7S uses short-action AICS-pattern magazines. It can use compatible polymer or metal AICS magazines, unlike the LR/SR-pattern magazines used by conventional CM10 semi-automatic rifles.

The available 308 bolt-action magazine is a 10-round Magpul PMAG 7.62 AC selected for the CM7S platform.

308 Suppressor Ready Rifle Dimensions

• Weight: 7 pounds 4 ounces
• Overall length: 28.25 to 36 inches
• Length of pull: 6.25 to 14.25 inches
• Magazine pattern: Short-action AICS

These are verified firearm measurements. Any different weight or dimensions displayed elsewhere in the product interface are shipping values rather than firearm specifications.

CM Limited Lifetime Warranty

The CM7S 308 Suppressor Ready Rifle is covered by the Chattahoochee Munitions limited lifetime warranty for the original purchaser. Coverage applies to the functional operation of the firearm in its original CM configuration when appropriate ammunition is used.

Review the complete Chattahoochee Munitions warranty for coverage terms and exclusions.