CM7S 8.6 Blackout Barreled Action 8″
CM7S Action – Full PVD Coated
The CM7S action 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 8″ Barrel – E100 Blackout Cerakote
- 416R Stainless Steel
- 5R rifling
- 1:5 or 1:3 twist rate
- Shouldered crown
- 5/8×24 muzzle threads
Weight: 49.21oz or 3.07lbs (weight and dimensions on other tab are for shipping purposes)
Blackout Barreled Action 8″: The Pinnacle of Compact Lethality
In the world of modern firearm engineering, the 8.6 Blackout cartridge has redefined what is possible from a short-barrel platform. At the center of this revolution is the Blackout barreled action 8-inch configuration. This ultra-compact assembly is designed for shooters who demand the highest level of maneuverability without sacrificing the devastating terminal ballistics that the 8.6 BLK is famous for.
Whether you are building a specialized “backpack rifle,” a discreet truck gun, or a dedicated suppressed hunting platform, starting with a premium Blackout barreled action 8 ensures that your build is founded on precision and reliability. At Chattahoochee Munitions, we’ve engineered this 8-inch system to serve as the ultimate “silent partner” for tactical professionals and elite hunters alike.
Why Choose the 8-Inch Configuration?
The 8.6 Blackout was specifically designed to burn its powder efficiently in very short barrels. While a 16-inch barrel offers higher velocities for supersonic rounds, the Blackout barreled action 8 is the “sweet spot” for those primarily focused on subsonic, suppressed performance.
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Extreme Maneuverability: At only 8 inches in length, this barreled action allows you to navigate thick timber, tight vehicle cabs, or urban environments with ease.
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Suppressor Optimized: When you add a silencer to an 8-inch barrel, the overall length remains shorter than a standard unsuppressed rifle, maintaining the balance and ergonomics of a compact tool.
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Weight Savings: For the weight-conscious builder, the Blackout barreled action 8 cuts unnecessary bulk, making it the perfect choice for a lightweight pistol or SBR build.
Rotational Energy: The 1:3 Twist Revolution
The defining characteristic of the 8.6 Blackout is its radical 1:3 twist rate. In a traditional rifle, the twist simply stabilizes the bullet. In our Blackout barreled action 8, the twist rate is a force multiplier.
By spinning a heavy 300-grain bullet at incredibly high RPMs, the barrel imparts massive centrifugal force. Upon impact, this rotational energy forces the projectile to expand violently, creating wound cavities far larger than what the velocity alone would suggest. This “Fast Twist” technology is why an 8-inch barrel can deliver terminal performance that rivals much larger calibers.
Technical Overview: CM7S Action – Full PVD Coated
The foundation of our Blackout barreled action 8 is the CM7S action. This isn’t a mass-produced factory component; it is a precision-machined steel action built on the legendary Remington 700 footprint.
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Action Design: 3-lug design with a 60-degree bolt throw for faster cycling and maximum optic clearance.
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Bolt Construction: One-piece bolt with a 0.718″ body diameter for rock-solid stability.
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Smooth Operation: Wire EDM raceways ensure a bolt cycle that feels like it’s on ball bearings.
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PVD Coating: Every CM7S action features a full Physical Vapor Deposition (PVD) coating. This provides a hard-as-diamonds finish that resists corrosion and provides permanent lubricity.
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Optic Mounting: Comes standard with a Pinned 20 MOA Picatinny Rail, giving you the elevation needed for long-distance subsonic trajectory compensation.
CM 8.6 BLK 8″ Barrel Specifications
Every Blackout barreled action 8 we ship is built to match-grade standards.
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Material: 416R Stainless Steel for superior accuracy and weather resistance.
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Finish: E100 Blackout Cerakote for a non-reflective, durable tactical finish.
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Rifling: 5R rifling for reduced bullet deformation and easier cleaning.
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Twist Rate: 1:3 (Optimized for heavy subsonic projectiles).
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Muzzle Threads: 5/8×24 threads, ready for our CM PLACID 375 Suppressor.
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Weight: Ultra-lightweight for high-mobility builds.
Building Your Ultimate Custom Rifle
Because our Blackout barreled action 8 utilizes the Remington 700 footprint, the customization options are endless.
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The Silent Hunter: Pair this action with a folding chassis and a large-bore suppressor for a hog-hunting rig that can be carried in a small daypack.
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The Tactical Pistol: Build a bolt-action pistol that offers the punch of a .338 in a package that fits inside a vehicle console.
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Modern Precision: Drop this assembly into a WOOX Walnut Stock for a high-end look that combines traditional aesthetics with futuristic ballistics.
If you are looking for slightly more velocity, you can also explore our 8.6 Blackout Barreled Action 12″ or the full-length 16-inch version.
Frequently Asked Questions (FAQ)
Q: Is the Blackout barreled action 8″ suppressor ready? A: Absolutely. It features the industry-standard 5/8×24 thread pitch. You must use a suppressor with a .338 bore or larger. We highly recommend a dedicated 8.6 or .375 silencer for maximum safety and performance.
Q: Can I hunt big game with an 8-inch barrel? A: Yes. Within appropriate ranges (typically under 150-200 yards for subsonic), the 8.6 Blackout has successfully taken large game like hogs and deer. The rotational energy from the 1:3 twist ensures massive terminal effect regardless of the short barrel.
Q: What magazines do I need for this action? A: The Blackout barreled action 8 utilizes standard AICS-pattern short-action magazines. Most shooters find that .308 or 6.5 Creedmoor AICS magazines work perfectly.
Q: Is this considered an SBR or a Pistol? A: As a barreled action, it is simply a part. However, once you build it, if you add a stock, it is an SBR (Short Barreled Rifle) and requires a tax stamp. If you use a pistol brace or no stock, it can be built as a pistol (check your local and federal laws).
Q: What is the benefit of the PVD coating? A: PVD is much more durable than standard bluing. It reduces friction, meaning the bolt is easier to cycle under stress and is protected from the elements during wet-weather hunts.
The Chattahoochee Munitions Quality Guarantee
Located in Roswell, GA, our team at Chattahoochee Munitions is dedicated to the advancement of high-performance cartridges. Whether you are interested in the 338 ARC or the 8.6 Blackout, we specialize in platforms that offer a competitive edge.
Every Blackout barreled action 8 we sell is hand-inspected for headspace, timing, and finish quality. When you choose CM, you are choosing craftsmanship and an obsession with big-bore precision.
[Secure your 8″ Blackout Barreled Action today] and start building the most versatile compact rifle in your safe.
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