CM7S 8.6 Blackout Barreled Action 12″
CM7S Action – Full PVD Coated
The CM7S 8.6 Blackout Barreled Action 12” is designed for hunting use. It can also be used for competition. It is a steel action with a Remington 700-style footprint. The CM7S has several features that factory actions lack.
- Based on the classic Remington 700 footprint with a 3-lug design
- 60-degree throw
- M16 style extractor
- One-piece bolt – 0.718″ Bolt Body DIA.
- Integrated recoil lug
- Wire EDM raceways for more uniform tolerances and smoother cycling
- Pinned 20 MOA Picatinny Rail
- Large ejection port and cut-out for a light-weight action body- 25oz total weight
- .062” firing pin to accommodate SRP brass
- Dual Pinned .300” recoil lug
- Tool-less fire control removal
- Accepts any Remington 700 style trigger – Trigger Pins Included
- 1-1/16”-16 thread pitch
- Side bolt-stop release
- Oversized bolt knob
- Spiral fluted bolt
- Full PVD coating for more corrosion protection and smoother operation
CM 8.6 BLK 12″ Barrel – E100 Blackout Cerakote
- 416R Stainless Steel
- 5R rifling
- 1:5 or 1:3 twist rate
- Shouldered crown
- 5/8×24 muzzle threads
Weight: 57.4oz or 3.59lbs (weight and dimensions on other tab are for shipping purposes)
8.6 Blackout Barreled Action 12″: The Apex of Subsonic and Supersonic Power
In the world of modern precision rifles, few innovations have generated as much excitement as the 8.6 Blackout. Designed to be the “big brother” to the .300 Blackout, this caliber redefines what is possible from a short-action platform. At the center of this revolution is the 8.6 Blackout barreled action with a 12-inch barrel—a configuration specifically engineered to deliver devastating energy, whether you are shooting suppressed subsonics or high-velocity supersonic rounds.
If you are looking to build a compact, hard-hitting rifle that dominates both the range and the hunting field, starting with a professional-grade barreled action is the only way to ensure maximum performance and reliability.
Why the 8.6 Blackout Barreled Action is a Game Changer
The 8.6 Blackout (8.6 BLK) utilizes a fast 1:3 twist rate, a radical departure from traditional rifling. This “fast twist” technology spins the bullet at incredibly high RPMs, generating centrifugal force that transfers massive energy upon impact. When you choose an 8.6 Blackout barreled action, you are tapping into a system that offers:
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Unrivaled Terminal Ballistics: The high rotational energy expands hunting projectiles more reliably, even at lower subsonic velocities.
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Compact Lethality: The 12-inch barrel length is the “Goldilocks” zone for this caliber, providing enough length for powder burn while remaining incredibly maneuverable.
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Versatility: Capable of ethical deer and elk hunting at appropriate ranges, yet quiet enough for backyard target practice when suppressed.
Technical Specifications & Precision Engineering
Our 12″ 8.6 Blackout barreled action is built for those who demand “zero-fail” equipment. Every component is selected to withstand the unique pressures and rotational forces of the 8.6 BLK cartridge.
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Caliber: 8.6 Blackout (338-caliber projectiles)
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Barrel Length: 12 Inches (Match Grade Steel)
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Twist Rate: 1:3 Fast Twist (Optimized for heavy subsonic and light supersonic loads)
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Action: Premium Short Action (Compatible with standard Remington 700 footprint chassis)
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Muzzle Thread: M18x1.5 or 5/8×24 (Standard for large-bore suppressors)
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Finish: Durable, corrosion-resistant coatings designed for field use.
Built for Suppressed Performance
The 8.6 Blackout was born to be suppressed. By starting with a bolt-action 8.6 Blackout barreled action, you achieve the ultimate “silent but deadly” platform. Without the noise of a cycling semi-auto action, the only thing you hear is the firing pin and the impact of the 300+ grain bullet on your target.
Benefits of the 12-Inch Barrel Length
Many shooters ask why 12 inches is the preferred length for the 8.6 BLK. The answer lies in the cartridge’s efficiency.
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Ideal for SBR and Pistol Builds: The 12-inch length makes this the perfect candidate for a Short Barreled Rifle (SBR) or a specialized bolt-action pistol.
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Maneuverability: Whether you are navigating thick timber on a hog hunt or moving through a tactical environment, a short barrel prevents snagging and allows for faster target acquisition.
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Optimal Twist Stabilization: The 12-inch travel distance is more than enough for the 1:3 twist to stabilize heavy 338 projectiles, ensuring pinpoint accuracy out to several hundred yards.
Applications: From Tactical Utility to Big Game Hunting
The 8.6 Blackout barreled action is a multi-role tool that bridges the gap between traditional rifle calibers and heavy-hitting subsonic platforms.
The Ultimate Hog and Predator Setup
For the night hunter, there is no better choice. The 8.6 Blackout provides the “knock-down” power of a much larger rifle in a package that is easy to swing while using thermal or night vision optics. It anchors large boars in their tracks, preventing them from running into thick cover.
Big Game Success
While often praised for its subsonic capabilities, the 8.6 BLK is a beast with supersonic ammunition. It provides a flat enough trajectory for medium-range hunting, making it a viable option for deer and even elk in timber-heavy environments where shots are typically under 300 yards.
Why Trust Chattahoochee Munitions?
Located north of the Chattahoochee River in Roswell, GA, we are custom manufacturers who specialize in the latest firearm technology. We serve civilian, law enforcement, and military clients who require more than just a standard rifle.
Our team is deeply invested in the development of “ARC” and “Blackout” platforms, including the high-performance 338 ARC. When you buy an 8.6 Blackout barreled action from us, you aren’t just getting parts; you are getting a precision-fit assembly that has been checked for headspace, timing, and finish quality by experts who shoot what they build.
Frequently Asked Questions (FAQ)
1. What twist rate do you use for the 8.6 Blackout?
We utilize the industry-standard 1:3 twist rate. This is essential for the 8.6 Blackout to properly stabilize heavy bullets and maximize the “rotational energy” that makes the caliber so effective.
2. Can I use my .30 caliber suppressor on this?
No. The 8.6 Blackout uses .338 caliber projectiles. You must use a suppressor rated for .338 or larger, such as a dedicated 8.6 or .375 silencer.
3. What chassis does this barreled action fit?
Our actions are built on the most popular industry footprints (typically Remington 700). This allows you to choose from hundreds of different stocks and chassis systems to find the perfect fit for your ergonomics.
4. Is 12 inches enough for supersonic rounds?
Yes. The 8.6 Blackout is designed to burn its powder efficiently in shorter barrels. While you will see higher velocities in a 16-inch barrel, the 12-inch version still provides plenty of punch for supersonic hunting applications.
5. What kind of magazines are required?
Since the 8.6 Blackout is based on a thinned-down and shortened 6.5 Creedmoor/308 Winchester case, it typically utilizes standard AICS-pattern .308 magazines.
Build Your Dream Rifle Today
The 8.6 Blackout barreled action 12″ is the foundation of the most modern, versatile rifle you will ever own. From the incredible silence of its subsonic performance to the devastating energy of its fast-twist rifling, it is a platform that truly has no equal.
[Browse our full inventory of Barreled Actions] and start your custom build with Chattahoochee Munitions. Experience the future of big-bore precision.
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