8.6 BLK AR10 Rifle | CM10 16″
The CM10 8.6 BLK AR10 Rifle is Chattahoochee Munitions’ full-length large-frame semi-automatic 8.6 Blackout platform. This 16-inch configuration combines CM’s billet receiver set with a Mos-Tek barrel, adjustable gas system, adjustable buffer, customized feed ramps and a selectable TriggerTech Duty trigger.
CM has been building 8.6 Blackout firearms since the cartridge’s early introduction, across both semi-automatic and bolt-action platforms. That experience has shaped the CM10 as a complete 8.6 Blackout system rather than simply a large-frame rifle fitted with an 8.6 Blackout barrel.
This version combines Black/Tungsten Cerakote with Black B5 Systems furniture for a subdued finish across the rifle.
CM10 Billet Receiver Set
The receiver set forms the foundation of the 8.6 BLK AR10 Rifle. Both receivers are CNC machined from 7075-T6 billet aluminum. The CM10 uses SR25-pattern magazine architecture with DPMS High Profile specifications for component compatibility.
- SR25-pattern magazine architecture
- DPMS High Profile component specifications
- 16 TPI barrel-nut specification
- CNC machined from 7075-T6 billet aluminum
- 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
- Black/Tungsten Cerakote
TriggerTech Duty Trigger Options
The CM10 uses the TriggerTech Duty trigger family. Customers can select among three configurations based on their preferred trigger shape and single-stage or two-stage operation:
- TriggerTech Duty single-stage straight trigger
- TriggerTech Duty single-stage curved trigger
- TriggerTech Duty two-stage straight trigger
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 Black grip
Adjustable Gas and Buffer System
8.6 Blackout can place different demands on a semi-automatic operating system depending on ammunition, projectile weight and suppressor configuration. CM therefore gives the CM10 8.6 BLK AR10 Rifle adjustment on both sides of the operating system.
A Superlative Arms .875 Adjustable Gas Block provides control over gas delivery, while the ODIN Works AR10 Adjustable Buffer provides adjustment of reciprocating mass.
Together, these components provide additional tuning capability around the ammunition and suppressed or unsuppressed configuration being used rather than relying on one fixed operating setup.
Receiver Extension and Stock
- B5 Systems SOPMOD Stock — Black
- CM Mil-Spec buffer tube — Black/Tungsten Cerakote
- QD endplate
- ODIN Works AR10 Adjustable Buffer
CM10 Low-Mass Bolt Carrier Group
The CM10 upper uses a low-mass bolt carrier group with weight-reduction cuts as part of the rifle’s 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
CM also incorporates customized feed ramps intended to support feeding of the large .338-caliber projectiles used by 8.6 Blackout. Feeding, magazine selection and operating-system adjustment are treated as parts of the complete CM10 configuration.
16″ Mos-Tek 8.6 Blackout Barrel
The 16-inch barrel in the 8.6 BLK AR10 Rifle is produced in collaboration with Mos-Tek and is available from CM with either a 1:3 or 1:5 twist.
- 16″ barrel length
- 416R stainless steel
- E100 Blackout Cerakote
- Choice of 1:3 or 1:5 twist
- Shouldered crown
- M18x1.5 muzzle threads
- .875 gas journal
CM offers both twist rates because projectile construction, length, weight, ammunition and velocity influence stabilization. Neither twist should be considered universally correct for every 8.6 Blackout load.
For a deeper explanation of CM’s experience with projectile weight, twist rate, barrel length and suppressed configurations, read the 8.6 Blackout Subsonic Guide.
Why Choose the 16″ CM10?
The 16-inch 8.6 BLK AR10 Rifle provides a conventional rifle-length CM10 configuration while retaining the adjustable operating architecture used throughout the 8.6 Blackout CM10 family.
CM also builds shorter CM10 configurations for customers prioritizing minimum overall system length, particularly when adding a suppressor. The 16-inch rifle instead provides the full-length option without the additional considerations associated with a short-barreled firearm.
In the subsonic loads CM has evaluated, powder utilization has been effectively complete at approximately 12 to 12.5 inches. The 16-inch barrel should therefore be understood as the conventional rifle-length configuration rather than as a claim that additional barrel length is inherently required for subsonic 8.6 Blackout performance.
CM10 Upper and Handguard
- CM10 ambidextrous charging handle — 7075 aluminum
- CM carbine-length gas tube — Melonite
- Superlative Arms .875 Adjustable Gas Block — Melonite
- CM10 LWS 15″ M-LOK handguard — Black/Tungsten Cerakote
- 6061 aluminum handguard
- Dual-taper attachment system
- 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 Black rail covers
The barrel uses M18x1.5 muzzle threads, allowing the rifle to be configured with an appropriate compatible muzzle device or suppressor mounting system.
SR25-Pattern Magazine Architecture
The CM10 uses conventional SR25-pattern magazine architecture rather than the AICS center-feed architecture CM uses for its large-frame 375 Raptor and 458 SOCOM XL platforms.
This rifle includes one 20-round 7.62 PMAG in Black. CM also offers additional vetted 20-round CM10 8.6 Blackout magazines for the platform.
Suppressed 8.6 BLK AR10 Rifle
The adjustable operating system is particularly useful when the CM10 is configured for suppressed 8.6 Blackout. Adding a suppressor changes the operating environment of a semi-automatic firearm, and ammunition characteristics can further affect the amount of adjustment required.
The Superlative Arms adjustable gas block and ODIN Works adjustable buffer give the 8.6 BLK AR10 Rifle 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 BLK AR10 Rifle Specifications
| Platform | CM10 Large-Frame Semi-Automatic |
|---|---|
| Caliber | 8.6 Blackout |
| Receiver Pattern | SR25 / DPMS High Profile |
| Receiver Material | 7075-T6 Billet Aluminum |
| Receiver Finish | Black/Tungsten Cerakote |
| Barrel Length | 16″ |
| Barrel Manufacturer | Mos-Tek / CM Collaboration |
| Barrel Material | 416R Stainless Steel |
| Barrel Finish | Black Nitride |
| Twist | 1:3 or 1:5 |
| Muzzle Threads | M18x1.5 |
| Gas Journal | .875″ |
| Gas Block | Superlative Arms .875 Adjustable — Melonite |
| 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 SOPMOD — Black |
| Magazine | 1x 20-Round PMAG 7.62 — Black |
| Overall Length | 34.875″–38.250″ |
| Weight | 8 lb 12.5 oz with unloaded magazine and no accessories |
| Length of Pull | 11.875″–15.250″ |
8.6 BLK AR10 Rifle FAQ
What is the CM10 8.6 Blackout platform?
The CM10 is Chattahoochee Munitions’ large-frame semi-automatic platform. The 8.6 Blackout version combines SR25-pattern magazine architecture and DPMS High Profile specifications with CM-specific feed ramps, adjustable gas, adjustable buffer weight and a purpose-selected barrel configuration.
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 both adjustable gas and an adjustable buffer?
The two systems provide separate tuning points. The Superlative Arms adjustable gas block controls gas delivery while the ODIN Works adjustable buffer changes reciprocating mass. This gives the rifle additional flexibility when configuring it around different ammunition and suppressor combinations.
Should I choose a 1:3 or 1:5 twist?
The appropriate twist depends on projectile construction, length, weight, velocity and intended ammunition. CM offers both twist rates because neither is universally ideal for every 8.6 Blackout configuration. Our 8.6 Blackout Subsonic Guide explains CM’s testing observations in greater detail.
What magazine does this 8.6 BLK AR10 rifle use?
The CM10 uses SR25-pattern magazines. This rifle includes one 20-round 7.62 PMAG in Black, and additional vetted 20-round CM10 8.6 Blackout magazines are available separately.
Is the CM10 intended for suppressed use?
The CM10’s adjustable gas and adjustable buffer systems provide additional tuning capability when changing ammunition or suppressor configurations. Compatibility should be verified with the specific suppressor, muzzle device and ammunition being used.
Where can I compare other CM 8.6 Blackout firearms?
Visit Area 8.6 to compare CM10 semi-automatic firearms, CM7S bolt-action platforms, barreled actions, magazines and other 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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