CM10 375 Raptor AR Rifle 16″ – Carbon Grey Cerakote

Chattahoochee Munitions manufactures this 375 Raptor AR rifle, the CM10, a complete factory 16-inch large-frame semi-automatic finished in Carbon Grey Cerakote with black furniture. It pairs a Mos-Tek 416R stainless barrel with a 1:8 twist, a centerfeed system, and an adjustable gas block and buffer that run both subsonic and supersonic loads.

The 375 Raptor, designed by Arne Brennan, is a .308-family cartridge, so its AR rifle is a large-frame AR10 pattern. See every configuration in the Raptor Paddock, and read 375 Raptor ballistics for velocity, energy, and drop.

Why a 16-Inch 375 Raptor AR Rifle

A 16-inch barrel gives the 190 gr supersonic semi-auto load 2,430 fps and needs no SBR registration, so this 375 Raptor AR rifle is the simplest way to own a semi-automatic 375 Raptor. It still runs the 400 gr subsonic load quietly behind a suppressor. At 7.75 lb with a 15-inch M-LOK handguard and full-length top rail, the CM10 is ready for an optic, a light, and a suppressor.

Choose the 375 Raptor AR rifle when you want one semi-automatic that handles both quiet subsonic work and longer supersonic shots.

Centerfeed System and Magazine

A dependable 375 Raptor semi-auto is more than a new barrel on a .308. The 400 gr subsonic cartridge is long (2.790 inches for the semi-auto load) and runs at low pressure, so the CM10 uses a centerfeed system: a DPMS low-profile 7075-T6 billet upper and lower, a centerfeed barrel extension, and an AICS-pattern lower that feeds from one included 10-round modified MDT metal magazine. Spares are available as CM10 375 Raptor magazines.

Gas, Buffer, and Bolt Carrier Group

A Superlative Arms .875-inch adjustable gas block and an Odin Works adjustable AR10 buffer let this 375 Raptor AR Rifle be tuned to cycle both subsonic and supersonic loads, suppressed or unsuppressed. The mil-spec 9310 bolt is high-pressure tested, magnetic-particle inspected, shot peened, and nitrided, with a nitride carrier, a staked gas key, and a tool-steel extractor with a T.E.A. spring. The CM10 Warhammer ambidextrous charging handle is made with Breek Arms.

Barrel and 1:8 Twist

The 16-inch barrel is made by Mos-Tek from 416R stainless steel with 5R rifling and a 1:8 twist, finished in E100 Blackout Cerakote, with a .875-inch gas journal and 11/16×24 muzzle threads. The 1:8 twist gives the long 400 gr subsonic bullet a wide stability margin over Maker Bullets’ 1:11 guidance. Read 375 Raptor twist rate for the details.

Trigger, Controls, and Handguard

Choose a TriggerTech Duty 3.5 lb trigger in single-stage flat, single-stage curved, or two-stage flat. The lower has a CM ambidextrous safety, a paddle magazine release, and an integral trigger guard. The CM10 LWS 15-inch M-LOK handguard has a steel barrel nut, QD points at 3 and 9 o’clock, and a full-length Picatinny top rail, with B5 Systems Bravo stock and grip.

Ammunition

From the 16-inch barrel, the Chattahoochee Munitions 190 gr Maker T-REX semi-auto supersonic load averages 2,430 fps, and the 400 gr Maker REX semi-auto subsonic load carries about 842 ft-lb at 100 yards for suppressed shooting. Use the semi-auto loads: 400 gr subsonic for semi-auto and 190 gr supersonic for semi-auto. The bolt action loads are not intended to cycle a semi-automatic. Full tables are in 375 Raptor ballistics.

Suppressing the CM10

Use a suppressor rated for .375 caliber. With subsonic ammunition, Chattahoochee Munitions recommends an enclosed suppressor such as the PLACID 375. With supersonic ammunition, a flow-through suppressor is recommended on the CM10. The CM10 has been tested with the PLACID 375. The 375 Raptor suppressor guide covers the choice in detail.

Carbon Grey Cerakote Finish

This CM10 has Carbon Grey Cerakote receivers, handguard, and buffer tube with black B5 Systems furniture and rail covers. Mechanical specifications match the Cobalt Kinetics Green Cerakote and FDE Metallic Cerakote variations.

375 Raptor AR Rifle Specifications

• Manufacturer: Chattahoochee Munitions
• Platform: CM10 large-frame semi-automatic (AR10 pattern)
• Chambering: 375 Raptor (designed by Arne Brennan)
• Configuration: Rifle
• Barrel: 16-inch Mos-Tek 416R stainless steel, 5R rifling, centerfeed barrel extension, .875-inch gas journal
• Twist rate: 1:8
• Barrel finish: E100 Blackout Cerakote
• Muzzle: 11/16×24 threads; thread protector or muzzle brake option
• Receivers: 7075-T6 billet, CNC machined, DPMS low profile, centerfeed AICS-pattern lower, no forward assist
• Gas: Superlative Arms .875-inch adjustable gas block, CM carbine gas tube (Melonite)
• Buffer: Odin Works adjustable AR10 buffer, CM mil-spec buffer tube, QD end plate
• Bolt carrier group: Mil-spec 9310 bolt, HPT/MPI, shot peened, nitride; nitride carrier and staked gas key; tool-steel extractor with T.E.A. spring
• Charging handle: CM10 Warhammer ambidextrous, 7075, with Breek Arms
• Trigger: TriggerTech Duty 3.5 lb: single-stage flat, single-stage curved, or two-stage flat
• Lower controls: CM ambidextrous safety, paddle magazine release, integral trigger guard
• Handguard: CM10 LWS 15-inch M-LOK, 6061, steel barrel nut, QD at 3 and 9 o’clock, full-length Picatinny top rail
• Furniture: B5 Systems Bravo stock, grip, and rail covers
• Finish: Carbon Grey Cerakote receivers, handguard, and buffer tube with black B5 Systems furniture and rail covers
• Magazine: One 10-round modified MDT metal AICS-pattern
• Length of pull: 11.75-15.00 inches
• Overall length: 32.75-36.00 inches
• Weight: 7.75 lb, complete firearm; the listing weight is for shipping

375 Raptor AR Rifle FAQ

Who makes a 375 Raptor AR rifle?

Chattahoochee Munitions manufactures the CM10, a complete factory 375 Raptor AR rifle in 16 inches and an AR10 SBR in 12.5 inches, in Carbon Grey Cerakote, FDE Metallic Cerakote, and Cobalt Kinetics Green Cerakote.

Is the CM10 375 Raptor just a .308 AR10 with a new barrel?

No. It uses a centerfeed system, a modified MDT metal AICS-pattern magazine, an adjustable gas block, and an adjustable buffer to feed and cycle long, low-pressure 375 Raptor rounds reliably.

What ammunition should I use in the CM10 375 Raptor?

The Chattahoochee Munitions semi-auto loads: 400 gr subsonic and 190 gr supersonic. The bolt action loads are not intended to cycle a semi-automatic.

What magazine does the CM10 375 Raptor use?

A modified MDT metal AICS-pattern magazine. One 10-round magazine is included.

What suppressor should I use on the CM10 375 Raptor?

An enclosed suppressor such as the PLACID 375 with subsonic ammunition, and a flow-through suppressor with supersonic ammunition. Any suppressor must be rated for .375 caliber.

What twist rate does the CM10 375 Raptor use?

A 1:8 twist in a Mos-Tek 416R stainless barrel with 5R rifling, finished in E100 Blackout Cerakote.

Does the 16-inch CM10 375 Raptor need SBR registration?

No. With a 16-inch barrel, the CM10 is a standard rifle. State and local laws still apply.

Who designed the 375 Raptor?

The 375 Raptor was designed by Arne Brennan. Chattahoochee Munitions manufactures 375 Raptor firearms, barrels, magazines, suppressors, and ammunition.