CMMG BANSHEE® Mk4 — .300 Blackout, 8" Medium Taper Threaded Barrel (Black Nitride), 30+1, EML 7" M-LOK® Handguard, Midnight Bronze Cerakote® Receiver, ZEROED™ Grip | Model 30AF20AMB | UPC 810148623562

Short, Suppressor-Ready, and Built to Run

Meet the ultra-compact CMMG BANSHEE® Mk4 in .300 BLK—a purpose-driven platform that punches hard in tight spaces. Anchored by an 8" medium-taper, threaded barrel (black nitride) for durability and smooth cycling, the BANSHEE is tuned around the versatile .300 Blackout cartridge so you can optimize performance with both supersonic and subsonic loads (with or without a suppressor, where legal). A lightweight EML 7" free-float M-LOK® handguard offers rock-solid accessory mounting, while the Midnight Bronze Cerakote® upper/lower receiver set provides rugged protection and a premium, low-glare finish. Ergonomics come standard with the CMMG ZEROED™ pistol grip and familiar AR-15 controls—ready for defensive roles, range work, vehicle/travel use, and training.

Capacity: 30+1 (where legal) • Model: 30AF20AMB • UPC: 810148623562

Why This BANSHEE Configuration Stands Out

Optimized 8" Barrel for .300 BLK

The 8-inch medium-taper barrel is a sweet spot for .300 Blackout, balancing compact handling with dependable dwell time. Black nitride treatment resists wear, heat, and corrosion, while the threaded muzzle (verify pitch on your specific unit) is ready for brakes, comps, or suppressor mounts.

EML 7" Free-Float M-LOK® Handguard

Compact, rigid, and comfortable—this free-float handguard keeps pressure off the barrel for consistent accuracy and gives you multiple M-LOK slots for lights, QD cups, vertical grips, hand stops, and rail sections.

Midnight Bronze Cerakote® Receiver Set

The aluminum Picatinny-top receiver duo arrives in Midnight Bronze Cerakote®, a durable ceramic coating that shrugs off weather, solvents, and hard classes while looking downright refined.

CMMG ZEROED™ Ergonomics

CMMG’s ZEROED™ grip features smart texturing and a comfortable angle that promotes a strong, repeatable purchase. Familiar AR-15 controls keep manipulations intuitive across roles.

Key Features at a Glance

• Caliber: .300 Blackout (runs both subsonic and supersonic with appropriate gas/ammmo selection)

• Capacity: 30+1 (where permitted)

• Barrel: 8" medium taper, black nitride, threaded for muzzle devices/suppressors*

• Handguard: EML 7" free-float M-LOK® with ample slot real estate

• Receivers: Aluminum, Picatinny-top, Midnight Bronze Cerakote® finish

• Controls/Grip: AR-pattern controls with CMMG ZEROED™ grip

• Model / UPC: 30AF20AMB / 810148623562

*Always verify thread pitch and follow all local/state/federal laws regarding muzzle devices and sound suppressors.

What You’ll Notice on the Range

Suppressor-Friendly Performance

.300 BLK shines when suppressed. The 8" barrel and threaded muzzle simplify setup so you can run subsonic for quiet recoil impulse or supersonic for maximum energy—all while tuning with quality ammo.

Compact, Balanced Handling

The short barrel and 7" handguard create a nimble front end that’s easy to maneuver in vehicles, around doorways, and over barricades—without giving up a stable sight picture.

Free-Float Consistency

By isolating the barrel from sling/barricade pressure, the EML handguard helps maintain your zero whether you’re shooting off a bag, tripod, or unorthodox support.

Durable, Low-Glare Finish

Midnight Bronze Cerakote® looks great and resists abrasion and corrosion—ideal for real-world conditions and high-round-count classes.

Ideal Use Cases

• Home & Property Defense: Compact footprint, controllable recoil, optics-ready

• Vehicle/Travel: Short overall length for easy stowage and safe deployment

• Training & Classes: Free-float accuracy, rugged finish, and proven reliability

• Suppressor Hosts: Threaded barrel plus .300 BLK subsonic options = quiet confidence (where legal)

Smart Setup Recommendations

• Optics: A micro red dot for speed, or a 1–6×/1–8× LPVO if you want reach; confirm height (absolute vs. lower 1/3) to match your cheek weld.

• White Light: A compact M-LOK-mounted light with momentary control is invaluable indoors and at dusk.

• Sling: A modern 2-point sling enables retention and positional stability.

• Mags & Ammo: Use quality 5.56/AR-15 pattern magazines optimized for .300 BLK geometry where possible; test both subsonic and supersonic loads for your gas setup.

Technical Specifications (30AF20AMB)

• Caliber: .300 AAC Blackout

• Action: Semi-automatic, AR-15 pattern

• Barrel: 8" medium taper, black nitride, threaded (pitch varies—verify your unit)

• Handguard: EML 7" free-float, M-LOK® compatible

• Receivers: Aluminum with full-length Picatinny top; Midnight Bronze Cerakote®

• Grip: CMMG ZEROED™

• Capacity: 30+1 (magazine included where legal)

• Model Number: 30AF20AMB

• UPC: 810148623562

Small parts (trigger style, muzzle device, handguard length specifics) may vary by production run. Always review the product label/serialized spec card for your exact configuration.

Frequently Asked Questions

Q: What thread pitch is the barrel?
A: Many .300 BLK barrels are 5/8×24, but thread pitch can vary. Check your rifle’s spec card before ordering muzzle devices or mounts.

Q: Can I shoot both subsonic and supersonic ammo?
A: Yes. .300 BLK is designed for both, but cycling and point of impact can differ. Test and zero with your duty load, especially if suppressed.

Q: What magazines does it use?
A: Standard AR-15/STANAG pattern magazines. For best results with .300 BLK, consider mags designed to improve stack geometry for the cartridge.

Q: Is the handguard truly free-float?
A: Yes—the EML handguard is a free-float design to support consistent accuracy.

SEO-Rich Highlights & Buyer Keywords

• CMMG BANSHEE Mk4 .300 Blackout

• 8" medium-taper threaded barrel, black nitride

• EML 7" free-float M-LOK handguard

• Midnight Bronze Cerakote aluminum receiver, Picatinny rail

• 30+1 capacity, CMMG ZEROED grip

• Model 30AF20AMB, UPC 810148623562

Meta Title (SEO)

CMMG BANSHEE Mk4 — .300 BLK, 8" Threaded, EML 7" M-LOK, Midnight Bronze Receiver, 30+1 | 30AF20AMB

Meta Description (SEO)

Run compact and confident with the CMMG BANSHEE Mk4 in .300 Blackout: 8" black-nitride threaded barrel, EML 7" free-float M-LOK handguard, Midnight Bronze Cerakote receivers, and 30+1 capacity. Model 30AF20AMB, UPC 810148623562.

Structured Data (Product Schema JSON-LD)

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Responsible Use Reminder

Follow all local, state, and federal laws regarding firearm purchase, possession, suppressor use, and magazine capacity. Verify thread pitch before adding muzzle devices, confirm torque on optics/rail hardware, function-test with your chosen ammunition, and practice safe handling and secure storage.

The End