CM10 375 Raptor Semi Auto Rifle

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CM10 375 Raptor Semi Auto Rifle 16″

The Chattahoochee Munitions CM10 375 Raptor Semi Auto Rifle is a purpose-built large-frame AR developed around the unique requirements of the .375 Raptor cartridge. This 16-inch configuration combines a fast 1:7 twist barrel, centerfeed architecture, modified MDT metal magazine, adjustable gas system and adjustable buffer system in a rifle designed to take advantage of both heavy subsonic and higher-velocity 375 Raptor ammunition.

Finished in FDE Metallic Cerakote with Coyote B5 Systems furniture, this CM10 pairs the capabilities of the 375 Raptor cartridge with a semi-automatic platform developed specifically around large-diameter projectiles and specialized ammunition.

Chattahoochee Munitions has extensive experience developing firearms in specialized calibers across both semi-automatic and bolt-action platforms. Rather than treating the CM10 as an existing large-frame AR with a different barrel installed, the receiver and feeding system were developed around the requirements of cartridges such as 375 Raptor.

The result is a 375 Raptor Semi Auto Rifle with a dedicated centerfeed system, AICS-pattern magazine architecture and the gas and buffer adjustability needed to support a broad range of ammunition configurations.

Centerfeed 375 Raptor Feeding System

The feeding system is one of the defining characteristics of the CM10. Instead of relying on a conventional double-stack AR10 magazine arrangement, the 375 Raptor Semi Auto Rifle uses a centerfeed configuration built around a modified MDT metal AICS-pattern magazine.

Each rifle includes a 10-round MDT metal magazine modified by Chattahoochee Munitions for the CM10 375 Raptor platform. The magazine and centerfeed barrel extension work as components of the CM10 system to accommodate the large-diameter projectiles associated with 375 Raptor ammunition.

Additional CM10 375 Raptor Modified MDT Magazines are available separately from Chattahoochee Munitions.

A paddle-style magazine release located forward of the trigger guard provides convenient access to the magazine release while maintaining the AICS-pattern magazine architecture.

CM10 Billet Receiver Set

The CM10 upper and lower receivers are CNC machined from 7075-T6 billet aluminum. The receiver set combines DPMS-pattern component compatibility with the centerfeed and AICS-pattern magazine architecture used by the CM10.

• 7075-T6 billet aluminum construction
• DPMS Low Profile specification
• 16 TPI barrel nut compatibility
• DPMS-pattern barrel extension and BCG compatibility
• AICS-pattern magazine-compatible lower receiver
• Centerfeed configuration
• Lightweight FCG faces and magazine well
• Upper receiver weight-reduction cuts
• No forward assist
• Fire/Safe engravings on both sides
• Integral trigger guard
• FDE Metallic Cerakote

CM10 Lower Receiver Components

• CM Ambidextrous Safety
• Paddle Magazine Release
• CM10 Pivot and Takedown Pins
• TriggerTech Duty Trigger
  • 3.5 lb Single-Stage Flat
  • 3.5 lb Single-Stage Curved
  • 3.5 lb Two-Stage Flat
• B5 Systems Coyote Grip

Adjustable Stock & Buffer System

• B5 Systems Bravo Stock – Coyote
• CM Mil-Spec Buffer Tube – FDE Metallic Cerakote
• QD End Plate
• Odin Works Adjustable AR10 Buffer

The adjustable buffer works together with the rifle’s adjustable gas system, giving the 375 Raptor Semi Auto Rifle additional tuning capability when used across different ammunition and suppressed configurations.

CM10 Upper Receiver & Bolt Carrier Group

The CM10 upper receiver uses a nitride-finished large-frame bolt carrier group built around proven materials and inspection processes.

• Mil-Spec 9310 steel
• HPT bolt – High Pressure Tested / Proof Tested
• MPI bolt – Magnetic Particle Inspected
• Shot-peened bolt
• Nitride-coated bolt
• Nitride-coated carrier
• Nitride-coated gas key
• Gas key hardened to USGI specifications
• Grade 8 hardened fasteners
• Gas key staked per Mil-Spec
• Tool-steel extractor
• T.E.A. extractor spring
• Black extractor insert
• Mil-Spec Crane O-ring

Ambidextrous Charging Handle

The CM10 uses the CM10 Warhammer Ambidextrous Charging Handle, manufactured from 7075 aluminum and developed in collaboration with Breek Arms.

Adjustable Gas System

• CM Carbine Gas Tube – Melonite
• Superlative Arms .875″ Adjustable Gas Block – DLC

Combined with the adjustable buffer, the adjustable gas system provides the tuning capability important to a 375 Raptor Semi Auto Rifle intended to operate with different projectile weights and suppressed configurations.

15″ CM10 LWS M-LOK Handguard

The 16-inch rifle uses the CM10 LWS 15-inch M-LOK handguard finished in FDE Metallic Cerakote.

• 6061 aluminum construction
• Steel barrel nut
• QD attachment points at 3 and 9 o’clock
• M-LOK attachment surfaces on sides and bottom
• Full-length Picatinny top rail
• B5 Systems Coyote rail covers

16″ 1:7 Twist 375 Raptor Barrel

The 375 Raptor Semi Auto Rifle uses a 16-inch barrel developed by Chattahoochee Munitions in collaboration with Mos-Tek. The fast 1:7 twist rate provides the stabilization required by the heavy projectiles frequently used with the 375 Raptor.

• Caliber: 375 Raptor
• Barrel Length: 16″
• Material: 416R Stainless Steel
• Twist Rate: 1:7
• Rifling: 5R
• Muzzle Threads: 11/16×24
• Gas Journal: .875″
• Finish: Black Cerakote
• Barrel Extension: Centerfeed

The combination of a fast-twist barrel and centerfeed architecture gives the CM10 a foundation specifically suited to the large, heavy projectiles that distinguish 375 Raptor from more conventional large-frame AR chamberings.

Modified MDT Metal Magazine

Includes:

• 1 × 10-round modified MDT metal AICS-pattern magazine

The magazine is modified by Chattahoochee Munitions specifically for the centerfeed CM10 375 Raptor system. Customers requiring additional magazines can purchase the CM10 375 Raptor Modified MDT Magazine separately.

Dimensions & Weight

Overall Length: 34.875″–38.250″
Overall Weight: 8 lb 4 oz with unloaded magazine and no accessories
Length of Pull: 11.375″–14.50″

Weights and dimensions shown elsewhere on the product page may reflect shipping specifications.

PLACID 375 Suppressor

The CM10 375 Raptor Semi Auto Rifle was developed and tested with the Chattahoochee Munitions PLACID 375 Suppressor. Pairing the rifle with PLACID 375 provides a suppressor option developed by Chattahoochee Munitions around the same cartridge and platform.

The rifle has also been tested with a SilencerCo Hybrid 46. Performance with other suppressors and ammunition may vary, particularly when operating a semi-automatic rifle with subsonic ammunition.

375 Raptor Subsonic Ammunition for Semi-Auto Operation

Chattahoochee Munitions offers a dedicated 400gr Maker REX 375 Raptor subsonic semi-auto load for the CM10 platform.

The semi-auto ammunition is specifically configured for semi-automatic operation and is distinct from the dedicated Chattahoochee Munitions bolt-action 400gr subsonic load. This gives CM10 owners an ammunition option developed around the operating requirements of the semi-automatic platform.

A Turnkey 375 Raptor Platform

The 375 Raptor Semi Auto Rifle is one part of a broader system available directly from Chattahoochee Munitions. Customers can pair the CM10 with the modified MDT metal magazine, dedicated semi-auto 375 Raptor ammunition and PLACID 375 Suppressor.

This allows the rifle, feeding system, ammunition and suppression components to be sourced as parts of a coordinated 375 Raptor platform rather than assembled from unrelated products.

Explore The Raptor Paddock

For more information about the 375 Raptor cartridge, Chattahoochee Munitions firearms, ammunition and related products, visit The Raptor Paddock, our dedicated 375 Raptor caliber hub.

Limited Lifetime Warranty

Chattahoochee Munitions firearms, including the 375 Raptor Semi Auto Rifle, are covered by our Limited Lifetime Warranty.

• Limited to the original purchaser
• Limited regarding functional performance
• Limited regarding the firearm’s original configuration

Why Choose the CM10 375 Raptor Semi Auto Rifle?

The CM10 is not simply a conventional AR10 fitted with a 375 Raptor barrel. Its centerfeed architecture, modified MDT metal magazine, adjustable gas system, adjustable buffer, fast 1:7 twist barrel and billet receiver set were selected as parts of a platform developed around the requirements of the cartridge.

For shooters looking for a 375 Raptor Semi Auto Rifle capable of supporting heavy subsonic ammunition, suppressed use and the broader capabilities of the cartridge, the CM10 provides a purpose-built semi-automatic platform backed by compatible ammunition, magazines and suppression products from Chattahoochee Munitions.