CMMG Banshee MK3 8.6 Blackout 12.50″ Pistol, 20+1
$2,045.14
Get the CMMG Banshee MK3 8.6 Blackout 12.50” Pistol, 20+1 for compact big-bore power. The 12.50” black nitride barrel, linear compensator, and 20+1 capacity deliver hard hits in a short package—ideal for hunting, defense, or truck carry.
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Description
The CMMG Banshee MK3 8.6 Blackout 12.50” Pistol, 20+1 delivers the punch of a big-bore AR in a compact, packable platform. Built on the Mk3 (AR-10 size) receiver set, this pistol chambers the hard-hitting 8.6 Blackout round—a subsonic-capable cartridge that pushes heavy bullets with authority. The 12.50” black nitride 4140CM barrel, 11” M-LOK handguard, and 20+1 magazine capacity make it a serious tool for hunters, truck-gun carriers, and shooters who want a short barrel without sacrificing terminal performance.
| Manufacturer | CMMG |
|---|---|
| Model | Banshee MK3 |
| Material | 4140CM barrel steel, 7075-T6 aluminum receiver |
| Compatibility | 8.6 Blackout ammunition; uses standard AR-10 pattern magazines |
| Finish | Black Nitride barrel, hardcoat anodized receiver |
| Weight | 7.40 lbs (per manufacturer specs) |
| Condition | New |
Key Features & Why They Matter
- 12.50” Black Nitride 4140CM Barrel — Why it matters: The nitriding process hardens the bore and exterior, increasing barrel life and resisting corrosion. The 12.50” length keeps the package short enough for vehicle or backpack carry while still stabilizing 8.6 Blackout bullets for consistent accuracy.
- CMMG Zeroed Linear Compensator — Why it matters: This muzzle device directs blast forward, reducing felt recoil and keeping muzzle rise in check. It also minimizes side-blast—important when shooting from a compact platform near barriers or in a vehicle.
- Zeroed Drop-In Single-Stage Trigger — Why it matters: You get a crisp, predictable break with short reset. That translates to faster follow-up shots and better precision at distance, especially when ringing steel or taking game.
- 11” M-LOK Handguard — Why it matters: The free-float design lets you mount lights, lasers, or grips exactly where you need them without affecting barrel harmonics. It also keeps your support hand cool during extended strings.
- 20+1 Magazine Capacity — Why it matters: More rounds on tap means less reloading when you’re on the move. It’s a practical advantage for defensive use or extended range sessions.
Who It’s For
This pistol is built for the shooter who wants a compact AR-style platform that hits like a rifle. It suits hunters who stalk in thick cover, truck-gun carriers who need a short, reliable package, and handloaders who want to experiment with subsonic 8.6 Blackout loads. If you value modularity and terminal performance in a small footprint, this is your rig.
Pros & Cons
- Pro: Compact length (29.50” overall) with full-size cartridge power.
- Pro: Black Nitride barrel and linear comp reduce maintenance and muzzle blast.
- Pro: 20+1 capacity gives you a solid edge in defensive situations.
- Con: At 7.40 lbs, it’s heavier than a typical 5.56 pistol—you feel the mass when carrying all day.
Comparison vs. Similar Platforms
| Feature | CMMG Banshee MK3 8.6 BLK | Zev Technologies OZ9C | Geissele Super Duty Pistol |
|---|---|---|---|
| Caliber | 8.6 Blackout | 9mm | 5.56 NATO |
| Barrel Length | 12.50” | 4.5” | 11.5” |
| Weight | 7.40 lbs | 2.4 lbs | 6.2 lbs |
| Capacity | 20+1 | 15+1 | 30+1 |
| Receiver Material | 7075-T6 aluminum | Stainless steel | 7075-T6 aluminum |
| Muzzle Device | Linear compensator | Threaded barrel | Flash hider |
| Price | $1,826.02 | $1,999 | $1,899 |
Frequently Asked Questions
What is the overall length of the CMMG Banshee MK3 8.6 Blackout pistol?
The overall length measures 29.50 inches with the brace collapsed, per manufacturer specs. That puts it in the compact pistol category—short enough for vehicle storage but long enough to shoulder comfortably.
Can I use standard AR-10 magazines with this pistol?
Yes. The Banshee MK3 accepts standard AR-10 pattern magazines. The included 20-round magazine gives you 20+1 capacity. You can also use 10-round or 25-round magazines if you prefer.
Is the 8.6 Blackout good for hunting?
Absolutely. The 8.6 Blackout was designed for hunting medium game at moderate ranges. With the right load, it delivers excellent terminal performance out to 300 yards. The 12.50” barrel still provides enough velocity for expansion with hunting bullets.
Does the Zeroed linear compensator reduce recoil significantly?
Yes. The linear compensator directs gas forward instead of sideways, which reduces felt recoil and muzzle rise. It also cuts down on side-blast, making it more pleasant to shoot from a compact platform.
How does the CMMG Banshee MK3 compare to a 5.56 pistol?
The 8.6 Blackout delivers more energy on target than a 5.56 pistol, especially with heavy subsonic loads. However, it’s heavier (7.40 lbs vs. ~6 lbs for a 5.56 pistol) and ammunition is less common. Choose the Banshee if you want big-bore performance in a short package.
Why Buy From Us
- ✅ Nationwide delivery to all 50 states
- ✅ Ships within 1-2 business days
- ✅ 30-day return policy
- ✅ Secure checkout with encrypted payment
Last updated: April 2026
Browse more options in our AR Pistols category, or check out related AR-10 Parts and 8.6 Blackout Ammunition.
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