CM7S 8.6 Blackout Barreled Action: The Ultimate 16″ Precision Foundation

8.6 Barreled Action: Supreme 16″ Precision for Elite Builds

 

Technical Overview: CM7S Action – Full PVD Coated

The CM7S 8.6 Barreled 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.

• Design: Based on the classic Remington 700 footprint with a 3-lug design

• Bolt Throw: 60-degree throw

• Extractor: M16 style extractor

• Bolt Body: One-piece bolt – 0.718″ Bolt Body DIA.

• Recoil Lug: Integrated recoil lug

• Tolerances: Wire EDM raceways for more uniform tolerances and smoother cycling

• Optic Rail: Pinned 20 MOA Picatinny Rail

• Ejection: Large ejection port and cut-out for a light-weight action body- 25oz total weight

• Firing Pin: .062” firing pin to accommodate SRP brass

• Recoil Management: Dual Pinned .300” recoil lug

• Maintenance: Tool-less fire control removal

• Trigger Compatibility: Accepts any Remington 700 style trigger – Trigger Pins Included

• Threading: 1-1/16”-16 thread pitch

• Controls: Side bolt-stop release and Oversized bolt knob

• Aesthetics: Spiral fluted bolt

• Protection: Full PVD coating for more corrosion protection and smoother operation

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CM 8.6 BLK 16″ Barrel Specifications

• Material: 416R Stainless Steel

• Finish: E100 Blackout Cerakote

• Rifling: 5R rifling

• Twist Rate: 1:3 twist rate

• Crown: Shouldered crown

• Muzzle Threads: 5/8×24 muzzle threads

• Availability: In Stock / Limited Availability / High Demand Product

• Weight: 57.4oz or 3.59lbs (weight and dimensions on other tab are for shipping purposes)

8.6 Barreled Action: The Apex of 16-Inch Precision

The arrival of the 8.6 Blackout has fundamentally shifted the landscape of big-bore rifle performance. Often described as the “.300 Blackout’s bigger, more powerful brother,” this caliber was engineered to deliver massive energy through rotational force. If you are looking to harness this power in its most stable and accurate form, our 8.6 barreled action featuring a 16-inch barrel is the definitive starting point for your next custom build.

Choosing a bolt-action platform for the 8.6 BLK allows for a level of precision and mechanical silence that semi-auto systems simply cannot replicate. At Chattahoochee Munitions, we’ve perfected this 16-inch 8.6 barreled action to provide the ideal balance of muzzle velocity, maneuverability, and long-range stability.

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Why the 16-Inch 8.6 Barreled Action is the Professional Choice

While shorter barrels are popular for the 8.6 BLK, the 16-inch 8.6 barreled action offers several distinct advantages for the serious marksman and hunter:

• Maximum Supersonic Velocity: The 16-inch barrel allows for a more efficient powder burn, pushing supersonic rounds to their full ballistic potential. This makes it a superior choice for open-country hunting.

• Non-NFA Compliance: Unlike shorter configurations, this 16-inch platform can be built into a standard rifle immediately. No tax stamps, no long ATF wait times—just pure performance.

• Enhanced Stability: The additional length provides a better weight balance when using high-magnification optics and heavy bipods for precision long-range engagements.

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The Science of the 1:3 Fast Twist Rate

The secret to the 8.6 barreled action‘s lethality is not just the caliber, but the rifling. Our barrels feature a radical 1:3 twist rate. This means the bullet completes a full rotation every three inches.

By the time a 300-grain subsonic bullet leaves your 16-inch muzzle, it is spinning at incredibly high RPMs. This centrifugal force causes massive wound cavities and ensures that the bullet expands reliably even at lower velocities. When you build on a Chattahoochee Munitions 8.6 barreled action, you are investing in a system designed specifically to handle these extreme rotational forces.

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Building Your Masterpiece: Chassis and Stocks

Because our 8.6 barreled action utilizes the Remington 700 footprint, your options for stocks and chassis are virtually limitless.

• For the Tactical Shooter: Drop this action into a folding aluminum chassis for a modern, modular precision rifle that is easy to transport.

• For the Traditional Hunter: Pair this with a lightweight WOOX Walnut Stock for a classic look with futuristic performance.

• Suppressor Integration: This platform is designed to be “hush-quiet.” By eliminating the noise of a cycling semi-auto action, the 8.6 BLK becomes an elite tool for stealthy predator control when paired with our large-bore suppressors.

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Performance: Subsonic Silence vs. Supersonic Power

The 8.6 barreled action is truly a dual-purpose machine, offering a range of capabilities that few other calibers can match.

1. Subsonic Dominance: Use 300gr+ projectiles for a shooting experience that is hearing-safe when suppressed. The 1:3 twist ensures these heavy hitters fly straight and hit hard.

2. Supersonic Range: Switch to lighter 160gr–210gr bullets for traditional hunting. The 16-inch barrel ensures you have the velocity needed to take down medium-to-large game at 300+ yards with confidence.

If you are a fan of versatile platforms, you may also be interested in our 300 Blackout barreled action or our high-performance 338 ARC options.

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Frequently Asked Questions (FAQ)

1. Is the 8.6 barreled action suppressor ready?

Yes. All our barrels feature a 5/8×24 thread pitch. However, you must use a suppressor with a .338 bore or larger. We recommend checking out our suppressor category for compatible models.

2. What magazines are required?

Our 8.6 barreled action is designed for short-action AICS-pattern magazines. Standard magazines for 6.5 Creedmoor or .308 Winchester generally work perfectly for this caliber.

3. Why use a 1:3 twist rate?

A 1:3 twist is essential for stabilizing the long, heavy bullets used in 8.6 Blackout. This fast twist ensures maximum “rotational lethality” on target.

4. Does this action fit standard Remington 700 stocks?

Yes. Since it uses the classic Remington 700-style footprint, it is compatible with the widest variety of stocks and triggers in the industry.

5. What is the benefit of the PVD coating?

The PVD (Physical Vapor Deposition) coating provides a low-friction, extremely hard surface that protects your 8.6 barreled action from corrosion while making the bolt cycle incredibly smooth.

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The Chattahoochee Munitions Quality Guarantee

Located in Roswell, GA, Chattahoochee Munitions is dedicated to the advancement of big-bore and niche caliber technology. We serve civilian, law enforcement, and military clients who require more than just an off-the-shelf rifle.

Every 8.6 barreled action we sell undergoes rigorous quality control to ensure that when it arrives at your door, it is ready to be the foundation of the most accurate rifle you own. When you choose us, you are choosing GA-based craftsmanship and an obsession with precision engineering.

[Order your 16″ 8.6 Barreled Action today] and experience the future of the bolt-action rifle.