Chattahoochee Munitions manufactures this 458 SOCOM AR10, the CM10, a complete factory 16-inch large-frame semi-automatic rifle finished in Cobalt Kinetics Green Cerakote with Coyote furniture. It is chambered in 458 SOCOM and configured for 458 SOCOM XL, with a 16-inch 416R stainless barrel, a 1:10 twist, a centerfeed system, and an adjustable gas block and buffer.
Standard 458 SOCOM is limited to 2.260 inches overall by the AR15 magazine. 458 SOCOM XL moves past that limit: the 2.035-inch, 650 gr subsonic projectile is seated less deeply, reclaiming usable case capacity for powder. See every configuration on Terminal 458, and read 458 SOCOM subsonic.
Why a 458 SOCOM AR10
Why does 458 SOCOM need an AR10? Standard 458 SOCOM is sized for the AR15, so its cartridge stops at 2.260 inches. The 650 gr 458 SOCOM XL load is 2.790 inches for the CM10, too long for an AR15 magazine, so this 458 SOCOM AR10 uses a large-frame receiver set and a centerfeed AICS-pattern magazine well to feed it.
Centerfeed System and Magazine
A dependable 458 SOCOM AR10 is more than a big-bore barrel on a .308 receiver. The 650 gr semi-auto cartridge is 2.790 inches long and runs at subsonic velocity, 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 magazine well. The 458 SOCOM AR10 ships with one modified MDT metal AICS-pattern magazine that holds 7 rounds and is configured for 458 SOCOM XL length. It is not suitable for shorter, standard 458 SOCOM loads. Spares are available as the 458 SOCOM magazine.
Gas, Buffer, and Bolt Carrier Group
A Superlative Arms .875-inch adjustable gas block on a pistol-length gas system and an Odin Works adjustable AR10 buffer let this 458 SOCOM AR10 be tuned to cycle the heavy subsonic load, suppressed or unsuppressed. The mil-spec 9310 bolt is magnetic-particle inspected, shot peened, and nitrided, with a nitride carrier and a tool-steel extractor. The CM10 Warhammer ambidextrous charging handle is made with Breek Arms.
Barrel and 1:10 Twist
The 16-inch barrel is 416R stainless steel with 5R rifling and a 1:10 twist, finished in E100 Blackout Cerakote, with a .875-inch gas journal and 11/16×24 muzzle threads. Choose a thread protector or an optional muzzle brake. The 1:10 twist stabilizes the long 650 gr bullet, where common AR15 458 SOCOM barrels use 1:14. Read 458 SOCOM twist rate and 458 SOCOM barrel length.
Trigger, Controls, and Handguard
Choose a TriggerTech Duty 3.5 lb trigger in single-stage straight, single-stage curved, or two-stage straight. The lower has a CM ambidextrous safety and a machined trigger guard, with no forward assist. The CM10 LWS 15-inch M-LOK handguard has a steel barrel nut, and the B5 Systems Bravo stock and grip set an 11.75 to 15.00-inch length of pull.
Ammunition
From a 12.5-inch CM10 barrel, the Chattahoochee Munitions 650 gr Maker REX semi-auto subsonic load averages about 1,012 fps and about 1,478 ft-lb at the muzzle. Use the semi-auto load, 650 gr subsonic for semi-auto, loaded to 2.790 inches with a propellant configuration that cycles the CM10. The bolt action load is not intended for a semi-automatic. Full tables are in 458 SOCOM ballistics, and 458 SOCOM bolt action vs semi auto compares the two platforms.
Suppressing the CM10
Use a suppressor rated for .458 caliber. With the 650 gr subsonic load, Chattahoochee Munitions recommends an enclosed suppressor on the CM10, and the adjustable gas block and buffer let you tune the rifle to it. Read the 458 SOCOM suppressor guide.
Cobalt Kinetics Green Cerakote Finish
This CM10 has Cobalt Kinetics Green Cerakote receivers and handguard with Coyote B5 Systems furniture. Mechanical specifications match the Carbon Grey Cerakote and FDE Metallic Cerakote models.
458 SOCOM AR10 Specifications
- Manufacturer: Chattahoochee Munitions
- Platform: CM10 large-frame semi-automatic (AR10 pattern)
- Chambering: 458 SOCOM, configured for 458 SOCOM XL (2.790-inch cartridge overall length)
- Configuration: Rifle
- Barrel: 16-inch 416R stainless steel, 5R rifling, centerfeed barrel extension, .875-inch gas journal
- Twist rate: 1:10
- Barrel finish: E100 Blackout Cerakote
- Muzzle: 11/16×24 threads; thread protector or optional muzzle brake
- Receivers: 7075-T6 billet, DPMS low profile, centerfeed AICS-pattern magazine well, no forward assist
- Gas: Superlative Arms .875-inch adjustable gas block, pistol-length Melonite gas tube
- Buffer: Odin Works adjustable AR10 buffer, CM mil-spec buffer tube, QD end plate
- Bolt carrier group: Mil-spec 9310 bolt, MPI, shot peened, nitride; nitride carrier; tool-steel extractor
- Charging handle: CM10 Warhammer ambidextrous, 7075, with Breek Arms
- Trigger: TriggerTech Duty 3.5 lb: single-stage straight, single-stage curved, or two-stage straight
- Handguard: CM10 LWS 15-inch M-LOK, 6061, steel barrel nut
- Furniture: B5 Systems Bravo stock and grip
- Finish: Cobalt Kinetics Green Cerakote receivers and handguard with Coyote B5 Systems furniture
- Magazine: One 7-round modified MDT metal AICS-pattern magazine included, configured for 458 SOCOM XL; not suitable for shorter 458 SOCOM loads
- Length of pull: 11.75-15.00 inches
- Overall length: 32.75-36.00 inches
- Weight: 7 lb 12 oz, complete firearm; the listing weight is for shipping
458 SOCOM AR10 FAQ
Who makes a 458 SOCOM AR10?
Chattahoochee Munitions manufactures the CM10 458 SOCOM AR10 in 16 inches with a 1:10 barrel, a centerfeed system, and an adjustable gas block and buffer, configured for 458 SOCOM XL. The CM10 458 SOCOM is offered with 12.5-inch and 16-inch barrels.
Who manufactures the Cobalt Kinetics Green Cerakote CM10?
Chattahoochee Munitions designs and manufactures the CM10 458 SOCOM. Cobalt Kinetics Green is the name of the Cerakote finish color applied to this firearm; it identifies the finish, not the manufacturer.
Is the CM10 a different chamber than 458 SOCOM?
No. The chamber is standard 458 SOCOM. The receivers and magazine are configured for 458 SOCOM XL, so they accept the 2.790-inch, 650 gr cartridge.
Can a 458 SOCOM AR15 fire 458 SOCOM XL?
No. An AR15 accepts cartridges up to 2.260 inches. 458 SOCOM XL needs an AR10-pattern rifle such as the CM10, or a short action such as the CM7S.
What ammunition does it use?
The Chattahoochee Munitions 650 gr Maker REX semi-auto subsonic load, loaded to 2.790 inches. The 2.802-inch bolt action load is for the CM7S.
What magazine does the CM10 458 SOCOM use?
One modified MDT metal AICS-pattern magazine that holds 7 rounds is included, configured for 458 SOCOM XL. It is not suitable for shorter, standard 458 SOCOM loads.
What suppressor should I use on it?
An enclosed suppressor rated for .458 caliber with the 650 gr subsonic load. The barrel has 11/16×24 threads, and the adjustable gas block and buffer tune the rifle to the suppressor.
How much does the 16-inch CM10 458 SOCOM weigh?
The complete firearm weighs 7 lb 12 oz. Any heavier listing weight is the shipping weight.
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