CM7S 8.6 Blackout 12.5″ Bolt Action Pistol or SBR – Cobalt Kinetics Green Cerakote

Chattahoochee Munitions manufactures this 8.6 Blackout short barreled rifle, a complete factory 12.5-inch CM7S bolt action pistol or SBR in Cobalt Kinetics Green Cerakote with Coyote furniture. It is chambered in 8.6 Blackout with a 12.5-inch Mos-Tek 416R stainless barrel in a 1:3 or 1:5 twist and a TriggerTech trigger, and it is made for suppressed subsonic .338 bullets.

Cobalt Kinetics Green is the Cerakote color of the finish; Chattahoochee Munitions is the manufacturer. See every configuration in Area 8.6, and read What Is 8.6 Blackout? if the cartridge is new to you.

Why an 8.6 Blackout Short Barreled Rifle

An 8.6 Blackout short barreled rifle with a 12.5-inch barrel gives up little subsonic velocity: in Chattahoochee Munitions testing, subsonic loads finish burning their powder at about 12 to 12.5 inches.

Ordered with the telescoping butt pad, it is a short-barreled rifle under the NFA; ordered with the Tailhook brace, it ships as a pistol. Either way the bolt action adds no action noise when suppressed.

Pistol or SBR

Choose the rear assembly when you order. The pistol configuration uses a telescoping Tailhook brace with an adjustable cheek riser. The SBR configuration uses a telescoping butt pad with an adjustable cheek riser and is a short-barreled rifle under the National Firearms Act, which transfers through your dealer after an approved ATF Form 4; see NFA Firearms. Length of pull is 6 inches collapsed, with stops at 11.5 and 12.5 inches and 13.5 inches fully extended.

CM7S Action and Trigger

The CM7S action has a Remington 700 footprint, three locking lugs, a 60-degree bolt throw, an M16-style extractor, a one-piece .718-inch spiral-fluted bolt, a pinned 20 MOA Picatinny rail, an integrated .300-inch recoil lug and a full PVD coating; the action weighs about 25 oz. The TriggerTech Remington 700 Primary trigger comes flat or curved and adjusts from 1.5 to 4.0 lb.

CM7 Chassis

The billet aluminum CM7 chassis has an AICS-pattern magazine well with an ambidextrous release, M-LOK slots, integrated QD sling sockets and a full-length bottom ARCA rail, with the CM Vertical Precision Crossover Grip. The same chassis is sold on its own as the CM7S Bolt Action Chassis.

12.5-Inch Barrel and 1:3 or 1:5 Twist

The 12.5-inch barrel on this 8.6 Blackout short barreled rifle is made by Mos-Tek from 416R stainless steel with 5R rifling, finished in E100 Blackout Cerakote, with a shouldered crown, 5/8×24 muzzle threads and a Remage barrel nut. In Chattahoochee Munitions testing with barrels of about 12.5 inches and longer, the 1:5 twist suits bullets of about 300 gr and lighter, and the 1:3 twist suits heavy subsonic bullets of about 323 gr and heavier. Choose the twist for the bullet you plan to shoot. Read 8.6 Blackout twist rate.

Ammunition and Magazine

It fires SAAMI 8.6 Blackout ammunition. Chattahoochee Munitions does not load 8.6 Blackout ammunition. Just Cause USA lists its 350 gr Maker REX subsonic load at 950 fps from 8 inches, 980 fps from 12 inches and 1,040 fps from 16 inches. Black Butterfly lists its 305 gr and 352 gr subsonic loads at about 1,000 fps from a 12.5-inch 1:3 barrel, tested in a Chattahoochee Munitions firearm, and sells a bolt action version. Read 8.6 Blackout ammo.

It ships with one 10-round AICS-pattern magazine; spares are the 8.6 Blackout magazine, a Magpul PMAG 10 7.62 AC vetted by Chattahoochee Munitions for the CM7S.

Suppressing the CM7S

Chattahoochee Munitions recommends an enclosed suppressor rated for .338 caliber or larger on the CM7S, with subsonic or supersonic ammunition. The bolt does not cycle when it fires, so the action adds no noise. The PLACID 375 is an enclosed suppressor rated through .375 caliber. Read the 8.6 Blackout suppressor guide.

Compare the cartridge in 375 Raptor vs 8.6 Blackout and 338 ARC vs 8.6 Blackout, or the two platforms in 8.6 Blackout bolt action vs semi auto. Also see the 8.6 Blackout bolt action pistol in Black Tungsten, the walnut 8.6 Blackout bolt action SBR and the semi-automatic 8.6 Blackout AR10 SBR.

8.6 Blackout Short Barreled Rifle Specifications

• Manufacturer: Chattahoochee Munitions
• Platform: CM7S bolt action
• Chambering: 8.6 Blackout
• Configuration: Pistol or SBR
• Barrel: 12.5-inch Mos-Tek 416R stainless steel, 5R rifling
• Twist rate: 1:3 or 1:5
• Barrel finish: E100 Blackout Cerakote
• Muzzle: 5/8×24 threads, shouldered crown
• Action: Remington 700 footprint, three locking lugs, 60-degree throw, full PVD coating, about 25 oz
• Bolt face: .308 Winchester family (.473-inch)
• Trigger: TriggerTech Remington 700 Primary, flat or curved, adjustable 1.5-4.0 lb
• Chassis: Billet aluminum CM7, Cobalt Kinetics Green Cerakote, Coyote furniture
• Rear assembly: Pistol: telescoping Tailhook brace with adjustable cheek riser; SBR: telescoping butt pad with adjustable cheek riser
• Magazine: One 10-round AICS-pattern magazine included
• Overall length: 25.50-32.50 inches
• Length of pull: 6-13.5 inches (6 collapsed, stops at 11.5 and 12.5, 13.5 fully extended)
• Weight: 6 lb 6 oz, complete firearm; the listing weight is for shipping

8.6 Blackout Short Barreled Rifle FAQ

Who makes an 8.6 Blackout Short Barreled Rifle?

Chattahoochee Munitions manufactures this 12.5-inch CM7S 8.6 Blackout in Cobalt Kinetics Green Cerakote, with a Mos-Tek 416R barrel and a TriggerTech trigger.

Is Cobalt Kinetics Green the maker of this firearm?

No. Cobalt Kinetics Green is the name of the Cerakote color on the finish. Chattahoochee Munitions manufactures the firearm.

Should I choose a 1:3 or 1:5 twist?

Choose 1:3 for heavy subsonic bullets of about 323 gr and up, and 1:5 for bullets of about 300 gr and lighter. Those are Chattahoochee Munitions observations from barrels of about 12.5 inches and longer.

Is it a pistol or an SBR?

Either. With the Tailhook brace it ships as a pistol; with the telescoping butt pad it is a short-barreled rifle under the NFA and needs an approved ATF Form 4.

Is an 8.6 Blackout Short Barreled Rifle good for hunting?

Yes, for hogs and deer at close range with expanding subsonic bullets and a suppressor, or at longer range with supersonic hunting loads. Keep subsonic shots close because of the steep trajectory.

What ammunition does it fire?

SAAMI 8.6 Blackout factory ammunition, such as Just Cause USA and Black Butterfly subsonic loads. Chattahoochee Munitions does not load 8.6 Blackout ammunition.

What magazine does it use?

AICS-pattern short-action magazines. One 10-round magazine is included, and spares are the CM7S 8.6 Blackout magazine.

What suppressor should I use on it?

An enclosed suppressor rated for .338 caliber or larger. The barrel has 5/8×24 threads.

How much does it weigh?

The complete firearm weighs 6 lb 6 oz. Any heavier listing weight is the shipping weight.