The CM15 22 ARC Predator Rifle combines the high-velocity, supersonic performance of 22 ARC with Chattahoochee Munitions’ semi-automatic AR-15 platform. This 20-inch configuration uses CM’s billet receiver set, a straight-fluted 416R stainless steel barrel, Rifle +1 gas system, adjustable gas block, adjustable buffer system, TriggerTech AR15 Duty trigger, and a CM-vetted 22 ARC AR15 magazine.
The 20-inch configuration is the longest-barreled CM15 in the Flight Deck 22 family. For shooters considering a 22 ARC Predator Rifle, the full-length barrel emphasizes the velocity-oriented characteristics of the cartridge while retaining the rapid follow-up capability and familiar controls of a semi-automatic AR-15.
This configuration is finished in Black Tungsten Cerakote with black furniture and controls. It provides a distinctly different operating platform from the manually operated CM7S while remaining part of the same Flight Deck 22 ecosystem.
Why Choose a 20-Inch 22 ARC Predator Rifle?
A 22 ARC Predator Rifle benefits from a configuration that combines the cartridge’s velocity-oriented performance with a platform capable of fast follow-up shots. The CM15 provides that combination in a full-length AR-15 configuration.
The 20-inch barrel is well suited to hunters who prioritize the ballistic performance of the cartridge over minimum overall firearm length. For predator hunting across fields, open terrain, and other situations where shot opportunities may vary in distance, the full-length CM15 offers a practical semi-automatic configuration.
The rifle is paired with a Rifle +1 gas system, Superlative Arms adjustable gas block, and ODIN Works adjustable heavy buffer. Together, these components provide multiple tuning points within the operating system while maintaining the full-length configuration of the rifle.
For a deeper comparison between CM’s semi-automatic CM15 and manually operated CM7S, including barrel lengths, applications, and suppression considerations, read our 22 ARC Rifle Guide.
CM15 Billet Upper and Lower Receivers
The receiver set forms the foundation of the CM15 22 ARC Predator Rifle. Both receivers are CNC machined from 7075-T6 billet aluminum and manufactured around standard AR-15 component dimensions.
The lower receiver incorporates an integral trigger guard, flared machined magazine well, ambidextrous controls, and lightweight machining features. This configuration is finished in Black Tungsten Cerakote.
CM15 Receiver Features
- Material: CNC-machined 7075-T6 billet aluminum
- Platform: AR-15
- Safety markings: Pictogram-style Fire/Safe engravings on both sides
- Trigger guard: Integral
- Magazine well: Machined with wide flare
- Controls: Ambidextrous safety, magazine release, and bolt release
- Lower receiver weight: Approximately 8.0 oz.
- Finish: Black Tungsten Cerakote
TriggerTech AR15 Duty Trigger
The CM15 is equipped with a TriggerTech AR15 Duty trigger with a 3.5-pound total pull weight. Customers can select a straight, curved, or two-stage straight trigger configuration.
The TriggerTech Duty is the current fire-control system for the CM15 22 ARC family.
Lower Receiver Components
- Trigger: TriggerTech AR15 Duty, 3.5 lb. total pull weight
- Trigger options: Straight, curved, or two-stage straight
- Safety: CM ambidextrous safety
- Magazine release: CM ambidextrous magazine release
- Bolt release: CM15 ambidextrous bolt release
- Pivot and takedown pins: CM15
- Grip: B5 Systems, Black
Adjustable Receiver Extension System
The rear of the rifle uses a B5 Systems Bravo stock in black with a CM buffer tube finished in Black Tungsten Cerakote. A QD end plate provides an additional sling attachment point.
An ODIN Works Adjustable Heavy Buffer provides another tuning point within the CM15 operating system. Combined with the adjustable gas block, it allows gas delivery and reciprocating mass to be balanced as part of the complete rifle system.
Receiver Extension Components
- Stock: B5 Systems Bravo, Black
- Buffer tube: CM, Black Tungsten Cerakote
- End plate: QD
- Buffer: ODIN Works Adjustable Heavy Buffer
CM15 Low-Mass Bolt Carrier Group
The 22 ARC Predator Rifle uses the CM15 low-mass bolt carrier group. The bolt is manufactured from 9310 steel and is high-pressure tested and magnetic-particle inspected.
The bolt, carrier, and gas key receive a nitride finish. The carrier incorporates lightening cuts, while the gas key uses hardened Grade 8 fasteners that are properly staked.
CM15 Bolt Carrier Group Specifications
- Bolt: 9310 steel
- Bolt testing: HPT and MPI
- Bolt finish: Nitride
- Carrier finish: Nitride
- Gas key finish: Nitride
- Gas key: Hardened to USGI specifications
- Fasteners: Grade 8 hardened
- Gas-key staking: Staked to specification
- Extractor: Tool steel
- Carrier: Lightening cuts
20-Inch Straight-Fluted 22 ARC Barrel
The 20-inch barrel is a defining component of this 22 ARC Predator Rifle. It is manufactured from 416R stainless steel, uses a straight-fluted profile, and is finished in E100 Blackout Cerakote.
Chattahoochee Munitions specifies a 1:7 twist rate for our 22 ARC barrels. The barrel also uses a shouldered crown, .750-inch gas journal, 1/2×28 muzzle threads, and a Rifle +1 gas system.
For a 22 ARC Predator Rifle, the 20-inch barrel represents the longest semi-automatic barrel configuration in Flight Deck 22 and is intended for customers who prioritize a full-length rifle and the velocity-oriented characteristics of 22 ARC over minimum overall length.
20-Inch Barrel Specifications
- Chambering: 22 ARC
- Length: 20″
- Material: 416R stainless steel
- Profile: Straight fluted
- Finish: E100 Blackout Cerakote
- Twist: 1:7
- Crown: Shouldered
- Muzzle threads: 1/2×28
- Gas journal: .750″
- Gas system: Rifle +1
Rifle +1 Adjustable Gas System
The CM15 uses a Superlative Arms .750 Adjustable Gas Block with the Rifle +1 gas system.
The adjustable gas block works with the ODIN Works adjustable heavy buffer to provide two points of operating-system adjustment. Ammunition, muzzle devices, and suppressor configurations can change the amount of gas and energy acting on the operating system, making this adjustability a useful part of the CM15 system.
Suppressing the 22 ARC Predator Rifle
The CM15 22 ARC Predator Rifle is suppressor ready with 1/2×28 muzzle threads. Because the CM15 is a semi-automatic platform that relies on gas pressure to cycle the action, suppressor backpressure is an important part of system setup.
For the semi-automatic CM15, Chattahoochee Munitions generally favors a flow-through suppressor. Reducing additional backpressure can make it easier to maintain a balanced operating system while limiting unnecessary gas returned through the action.
The Superlative Arms adjustable gas block, Rifle +1 gas system, and ODIN Works adjustable heavy buffer provide additional tuning capability when the rifle is operated suppressed.
Flight Deck 22 is built around supersonic 22 ARC performance. A suppressor can substantially reduce muzzle blast, but it cannot eliminate the ballistic crack generated by a projectile traveling above the speed of sound.
CM15 15-Inch M-LOK Handguard
A 15-inch CM15 lightweight handguard surrounds the barrel and gas system. The handguard is machined from 6061 aluminum and finished in Black Tungsten Cerakote.
The attachment system uses a steel barrel nut and dual-taper interface. A full-length Picatinny top rail provides optics and accessory mounting space, while M-LOK interfaces are positioned along the sides and bottom.
Handguard Features
- Length: 15″
- Material: 6061 aluminum
- Attachment: Dual-taper system
- Barrel nut: Steel
- Top rail: Full-length Picatinny
- Accessory interface: M-LOK
- QD sockets: 3 and 9 o’clock positions
- Finish: Black Tungsten Cerakote
- Rail covers: B5 Systems, Black
Ambidextrous Charging Handle and Controls
The upper receiver includes a CM15 ambidextrous charging handle manufactured from 7075 aluminum, along with a dust cover and forward assist.
The ambidextrous charging handle complements the ambidextrous safety, magazine release, and bolt release in the lower receiver, providing accessible controls from either side of the rifle.
22 ARC AR15 Magazine
Each complete 22 ARC Predator Rifle includes one 10-round CM-vetted DURAMAG in black. The CM15 uses an AR-15 magazine architecture rather than the AICS-pattern magazine used by the CM7S bolt-action platform.
Additional magazines are available through the CM 22 ARC AR15 Magazine product page.
CM’s validation applies to the magazine as used with our CM15 22 ARC firearms. Function with every possible combination of third-party receivers, uppers, barrels, or other components is not guaranteed by Chattahoochee Munitions.
Muzzle Device Options
Product photography may show the rifle with a Dead Air Keymo brake configured as a suppressor host. Available muzzle-device configurations can vary and may include an A2-style device or compatible suppressor-mount options.
Customers requiring a different muzzle device can contact Chattahoochee Munitions regarding availability and any applicable price adjustment.
Complete CM15 20-Inch Predator Configuration
- Chambering: 22 ARC
- Platform: CM15 AR-15
- Operating system: Semi-automatic
- Receivers: 7075-T6 billet aluminum
- Receiver finish: Black Tungsten Cerakote
- Barrel: 20″ straight-fluted 416R stainless steel
- Barrel finish: E100 Blackout Cerakote
- Twist: 1:7
- Muzzle threads: 1/2×28
- Gas journal: .750″
- Gas system: Rifle +1
- Gas block: Superlative Arms .750 Adjustable
- Buffer: ODIN Works Adjustable Heavy Buffer
- Bolt: 9310 steel, HPT/MPI
- Trigger: TriggerTech AR15 Duty, 3.5 lb. total pull weight
- Trigger options: Straight, curved, or two-stage straight
- Handguard: CM15 15″ M-LOK
- Stock: B5 Systems Bravo, Black
- Grip: B5 Systems, Black
- Magazine: One 10-round CM-vetted 22 ARC AR15 DURAMAG, Black
- Overall length: 37.50″–40.75″
- Weight: 6 lb. 14 oz. with unloaded magazine and no accessories
- Length of pull: 11″–14.25″
- Warranty: Limited Lifetime Warranty
Part of the Flight Deck 22 Ecosystem
The 20-inch 22 ARC Predator Rifle provides a full-length semi-automatic option within Flight Deck 22. Its 20-inch barrel emphasizes the velocity-oriented side of the cartridge for customers who prioritize ballistic performance over minimum overall firearm length.
Shorter CM15 configurations provide alternatives for customers who place greater priority on reduced overall length. Flight Deck 22 also includes the manually operated CM7S family, CM7S barreled actions, a CM15 upper, and dedicated CM-vetted magazines for both operating platforms.
For help comparing CM15 and CM7S configurations, visit the 22 ARC Rifle Guide.
22 ARC Predator Rifle FAQ
Why choose a 20-inch barrel for a 22 ARC predator rifle?
The 20-inch configuration is the longest-barreled CM15 in Flight Deck 22. It provides a full-length option for predator hunters who prioritize the velocity-oriented characteristics of 22 ARC while retaining the rapid follow-up capability of a semi-automatic AR-15.
What barrel does the 20-inch CM15 use?
This 22 ARC Predator Rifle uses a 20-inch straight-fluted 416R stainless steel barrel finished in E100 Blackout Cerakote. It has a 1:7 twist, shouldered crown, .750-inch gas journal, 1/2×28 muzzle threads, and a Rifle +1 gas system.
What trigger is installed in the CM15?
The rifle uses a TriggerTech AR15 Duty trigger with a 3.5-pound total pull weight. Customers can select a straight, curved, or two-stage straight trigger configuration.
What steel is used for the CM15 bolt?
The CM15 bolt is manufactured from 9310 steel and is high-pressure tested and magnetic-particle inspected.
What gas system does the 20-inch CM15 use?
The 20-inch CM15 uses a Rifle +1 gas system with a Superlative Arms .750 adjustable gas block. The adjustable gas block works with the ODIN Works adjustable heavy buffer to provide multiple points of operating-system tuning.
Is the CM15 22 ARC suppressor ready?
Yes. The barrel is threaded 1/2×28. Chattahoochee Munitions generally favors a flow-through suppressor for the semi-automatic CM15 to help manage additional gas and backpressure.
Does a suppressor make 22 ARC subsonic?
No. Flight Deck 22 is built around supersonic 22 ARC performance. A suppressor reduces muzzle blast but does not eliminate the ballistic crack produced by a supersonic projectile.
What magazine does the CM15 use?
The CM15 uses the CM-vetted 22 ARC AR15 Magazine. One 10-round DURAMAG is included with the complete firearm.
How does the CM15 differ from the CM7S?
The CM15 is CM’s semi-automatic AR-15 platform, while the CM7S is a manually operated bolt action. The different operating systems use different magazine architectures and require different approaches to suppressor selection and system tuning.
Where can I see the complete CM 22 ARC lineup?
Visit Flight Deck 22 to explore CM15 rifles and uppers, CM7S firearms and barreled actions, and platform-specific magazines.
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