8.6 Blackout AR10 Rifle | CM10 16″
The CM10 8.6 Blackout AR10 Rifle combines the Chattahoochee Munitions billet large-frame semi-automatic platform with a 16-inch 8.6 Blackout barrel and an adjustable operating system. The result is a full-length CM10 configuration built around the requirements of 8.6 Blackout rather than simply adapting a generic large-frame rifle to the cartridge.
CM has worked with 8.6 Blackout since the cartridge’s early introduction, building both bolt-action and semi-automatic configurations. That experience informs the complete CM10 system: SR25-pattern magazine architecture, customized feed ramps for the large .338-caliber projectiles, adjustable gas, adjustable buffer weight, and a choice of 1:3 or 1:5 barrel twist.
This 16-inch version features Cobalt Kinetics Green Cerakote receivers and handguard with Coyote B5 Systems furniture.
CM10 Billet Receiver Set
The foundation of the 8.6 Blackout AR10 Rifle is the CM10 billet receiver set. The platform follows the SR25 magazine pattern while using DPMS High Profile specifications for components including barrel-extension, BCG and 16 TPI barrel-nut compatibility.
- CNC machined from 7075-T6 billet aluminum
- SR25-pattern magazine architecture
- DPMS High Profile component compatibility
- Lightweight fire-control-group faces and magazine well
- Weight-reduction cuts on upper receiver
- No forward assist
- Ambidextrous pictogram-style Fire/Safe engravings
- Integral trigger guard
- Machined magazine well with wide flare
- Cobalt Kinetics Green Cerakote
TriggerTech Duty Trigger Options
The CM10 is configured around the TriggerTech Duty trigger family. Customers can select the trigger configuration that best matches their preference:
- TriggerTech Duty single-stage straight trigger
- TriggerTech Duty single-stage curved trigger
- TriggerTech Duty two-stage straight trigger
The trigger is integrated with CM ambidextrous controls, including the safety, magazine release and bolt release.
CM10 Lower Components
- CM ambidextrous safety
- CM ambidextrous magazine release
- CM10 pivot and takedown pins
- TriggerTech Duty trigger — selectable configuration
- CM10 ambidextrous bolt release
- B5 Systems Coyote grip
Adjustable CM10 Operating System
Reliable semi-automatic 8.6 Blackout operation involves more than barrel length alone. Ammunition, projectile weight, suppressor configuration, gas delivery and reciprocating mass all influence how a large-frame semi-automatic firearm operates.
The CM10 8.6 Blackout AR10 Rifle therefore provides adjustment on both sides of the operating system through a Superlative Arms .875 Adjustable Gas Block and an ODIN Works AR10 Adjustable Buffer.
This allows the rifle to be configured around the ammunition and suppressed or unsuppressed setup being used rather than relying on a fixed gas-and-buffer combination.
Receiver Extension and Stock
- B5 Systems Bravo Stock — Coyote
- CM Mil-Spec buffer tube — Cobalt Kinetics Green Cerakote
- QD endplate
- ODIN Works AR10 Adjustable Buffer
CM10 Low-Mass Bolt Carrier Group
The CM10 upper uses a low-mass bolt carrier group as part of the adjustable operating system.
- 9310 steel bolt
- High-pressure tested bolt
- Magnetic-particle-inspected bolt
- Shot-peened bolt
- Nitride-coated bolt
- Nitride-coated carrier
- Nitride-coated gas key
- Hardened gas key
- Grade 8 hardened gas-key fasteners
- Staked gas key
- Tool-steel extractor
- T.E.A. extractor spring
- Black extractor insert
- Crane O-ring
The CM10 also incorporates customized feed ramps intended to support feeding of the large .338-caliber projectiles used by 8.6 Blackout.
16″ Mos-Tek 8.6 Blackout AR10 Barrel
The 16-inch barrel at the center of this 8.6 Blackout AR10 Rifle is produced in collaboration with Mos-Tek and is available with either a 1:3 or 1:5 twist.
- 16″ barrel length
- 416R stainless steel
- 5R rifling
- Choice of 1:3 or 1:5 twist
- M18x1.5 muzzle threads
- .875 gas journal
- Black Cerakote finish
CM offers both twist rates because projectile construction, length, weight, ammunition and velocity influence stabilization. Neither twist should be treated as universally correct for every 8.6 Blackout load.
For a deeper discussion of CM testing with twist rate, projectile weight, barrel length and suppression, read our 8.6 Blackout Subsonic Guide.
Why Choose the 16″ CM10?
The 16-inch configuration gives customers a conventional rifle-length 8.6 Blackout AR10 Rifle without the additional considerations associated with configuring a short-barreled firearm.
For customers primarily interested in subsonic ammunition and the shortest possible suppressed system, CM also offers shorter CM10 configurations. The 16-inch version instead provides additional barrel length while retaining the same adjustable gas-and-buffer architecture and 1:3 or 1:5 twist options.
CM testing with the subsonic loads we have evaluated has shown powder utilization to be effectively complete at approximately 12 to 12.5 inches. The 16-inch configuration should therefore be viewed as the full-length rifle option in the CM10 family rather than as a claim that additional barrel length is inherently necessary for subsonic 8.6 Blackout performance.
CM10 Handguard and Upper Components
- CM10 Warhammer ambidextrous charging handle — 7075 aluminum, developed in collaboration with Breek Arms
- CM carbine-length gas tube — Melonite
- Superlative Arms .875 Adjustable Gas Block
- CM10 LWS 15″ M-LOK handguard — Cobalt Kinetics Green Cerakote
- 6061 aluminum handguard
- Steel barrel nut
- QD attachment at 3 and 9 o’clock positions
- M-LOK attachment surfaces on sides and bottom
- Full Picatinny top rail
- B5 Systems Coyote rail covers
Vetted Magazine Architecture
Magazine selection is part of the CM10 system. The CM10 uses a conventional SR25-pattern magazine architecture rather than the AICS center-feed system used by CM’s 375 Raptor and 458 SOCOM XL large-frame configurations.
CM provides a vetted magazine with the rifle and also offers additional 20-round CM10 8.6 Blackout magazines for customers who want additional magazines for the platform.
This rifle includes one 20-round 7.62 PMAG in Coyote.
Suppressed 8.6 Blackout AR10 Configuration
The adjustable operating system is particularly useful when configuring a semi-automatic 8.6 Blackout firearm for suppressed use. The Superlative Arms adjustable gas block provides control over gas delivery while the ODIN Works adjustable buffer provides control over reciprocating mass.
Together, these components provide the 8.6 Blackout AR10 Rifle with two points of adjustment for tuning around the actual ammunition and suppressor combination being used.
Suppressor compatibility should always be verified for the specific muzzle device, suppressor, ammunition and barrel configuration.
CM10 16″ 8.6 Blackout AR10 Rifle Specifications
| Platform | CM10 Large-Frame Semi-Automatic |
|---|---|
| Caliber | 8.6 Blackout |
| Receiver Material | 7075-T6 Billet Aluminum |
| Receiver Finish | Cobalt Kinetics Green Cerakote |
| Barrel Length | 16″ |
| Barrel Manufacturer | Mos-Tek / CM Collaboration |
| Barrel Material | 416R Stainless Steel |
| Rifling | 5R |
| Twist | 1:3 or 1:5 |
| Muzzle Threads | M18x1.5 |
| Gas Journal | .875″ |
| Gas Block | Superlative Arms .875 Adjustable |
| Buffer | ODIN Works AR10 Adjustable |
| Trigger | TriggerTech Duty — Single-Stage Straight, Single-Stage Curved or Two-Stage Straight |
| Handguard | CM10 LWS 15″ M-LOK |
| Stock | B5 Systems Bravo — Coyote |
| Magazine | 1x 20-Round PMAG 7.62 — Coyote |
| Overall Length | 34.875″–38.250″ |
| Weight | 8 lb 10 oz with unloaded magazine and no accessories |
| Length of Pull | 11.375″–14.50″ |
8.6 Blackout AR10 Rifle FAQ
Is the CM10 an AR10-pattern 8.6 Blackout rifle?
Yes. The CM10 is Chattahoochee Munitions’ large-frame semi-automatic platform. It uses SR25-pattern magazines with DPMS High Profile component specifications and is configured specifically around 8.6 Blackout.
What trigger comes with the CM10?
The CM10 uses the TriggerTech Duty trigger family. Customers can select a single-stage straight, single-stage curved or two-stage straight trigger configuration.
Why does the CM10 use adjustable gas and an adjustable buffer?
The combination provides adjustment on both sides of the operating system. The Superlative Arms adjustable gas block controls gas delivery while the ODIN Works adjustable buffer allows reciprocating mass to be changed. This provides additional tuning capability for different ammunition and suppressor configurations.
Should I choose a 1:3 or 1:5 twist?
The appropriate twist depends on the projectile, ammunition and intended use. CM offers both because projectile construction, length, weight and velocity influence stabilization. Our 8.6 Blackout Subsonic Guide explains our testing and configuration approach in greater detail.
What magazine does the CM10 use?
The 8.6 Blackout CM10 uses an SR25-pattern magazine architecture. This rifle includes one 20-round 7.62 PMAG in Coyote, and CM offers additional vetted 20-round CM10 8.6 Blackout magazines.
Is the CM10 designed for suppressed use?
The CM10 incorporates adjustable gas and adjustable buffer systems that provide additional tuning capability when changing ammunition or suppressor configurations. Suppressor compatibility should be verified with the specific muzzle device, suppressor and ammunition being used.
Where can I compare other CM 8.6 Blackout firearms?
Visit Area 8.6 to compare CM10 semi-automatic rifles, shorter CM10 configurations, CM7S bolt-action firearms, barreled actions and supporting 8.6 Blackout components.
Limited Lifetime Warranty
Chattahoochee Munitions provides a limited lifetime warranty to the original purchaser covering functional performance in the firearm’s original configuration. See the current CM warranty terms for complete details.
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