CMMG BANSHEE Mk4 — .300 Blackout, 12.5" Medium-Taper, Threaded, EML 7" M-LOK®, Tungsten Cerakote
Model/SKU: 30AB20FTNG | UPC: 810148623661
Compact, controllable, and purpose-built for suppressed performance—the CMMG BANSHEE Mk4 in .300 Blackout delivers big-bore energy from a short, maneuverable package. Featuring a 12.50" medium-taper barrel with a Black Nitride treatment for longevity, a lightweight EML 7" free-float M-LOK® handguard, and a rugged Tungsten Cerakote® aluminum receiver set with full-length Picatinny, this BANSHEE is tuned for reliability with supers and subs alike. Add CMMG’s ZEROED™ grip ergonomics and you’ve got a premium AR-15–pattern platform that runs hard at the range, in the field, or around the ranch.
Why Choose this BANSHEE Mk4 (.300 BLK)
.300 Blackout versatility: Optimized for short barrels, .300 BLK offers excellent performance with supersonic and subsonic loads—ideal for pistol/SBR builds and suppressed use (where legal).
12.5" medium-taper barrel: Balances velocity and handling for reliable expansion with popular hunting/defense loads while keeping the system quick and nimble.
Black Nitride barrel finish: Improves corrosion/abrasion resistance and eases cleaning—great for high round counts.
EML 7" free-float handguard: Lightweight, rigid M-LOK® rail gives rock-solid accessory mounting without contacting the barrel for improved point-of-impact consistency.
Tungsten Cerakote receiver set: Durable, low-glare finish resists the elements and looks sharp on duty or at the range.
ZEROED™ grip: Enhanced angle, texture, and undercut promote a higher, more comfortable firing-hand position and better trigger reach.
AR-15 familiarity: Standard Mk4 controls, proven parts compatibility, and easy optics mounting keep training simple.
Key Specifications
Caliber: .300 AAC Blackout
Capacity: 30+1 (standard .300 BLK/5.56 pattern magazines)
Barrel: 12.50" medium-taper, Black Nitride, threaded (verify thread pitch before installing a muzzle device)
Handguard: EML 7" free-float M-LOK®
Upper/Lower: Aluminum receiver set with Tungsten Cerakote®; full-length Picatinny top rail
Operating System: Direct-impingement, semi-automatic
Controls: Standard AR-15 Mk4 pattern; CMMG ZEROED™ grip
Finish: Tungsten Cerakote receivers / black furniture
Model/SKU: 30AB20FTNG
UPC: 810148623661
Thread note: Many .300 BLK barrels use 5/8×24 threads, but always confirm your exact pitch before installing a brake, flash hider, or suppressor mount. Re-zero after any muzzle device change.
Real-World Performance You’ll Notice
Soft, predictable recoil: .300 BLK’s impulse in a 12.5" DI gun is smooth, supporting fast follow-ups and tight splits.
Free-float accuracy: The EML 7" handguard isolates the barrel for consistent POI, even with lights, PEQ/laser, or bipods attached.
Suppressor-friendly: Barrel length and caliber suit suppressed shooting (where legal); subsonic loads dramatically reduce blast.
Weather-tough build: Nitride steel + Cerakote aluminum shrug off rain, sweat, dust, and long range days.
Ideal Use Cases
Ranch/truck rifle: Compact handling for gates, vehicles, and varmint or hog control with appropriate ammo.
Range & training: Low flash with appropriate ammunition; excellent for drills, barricade work, and carbine classes.
Home/property defense: Short overall length and modern ergonomics aid control in tight quarters.
Hunting (where legal): Proven bullet options for hogs/varmints; confirm local regs on barrel length and suppressor use.
Setup Recommendations
Optics: A 1–6×/1–8× LPVO or rugged red dot (with 3× magnifier optional) suits the BANSHEE’s ranges.
Muzzle device: Choose a flash hider for low-light defense, a brake for daytime training, or a suppressor (where legal). Confirm thread pitch and alignment.
Lights & controls: Mount a compact weapon light on M-LOK at 3/9 o’clock; consider a hand stop for consistent indexing behind the muzzle device.
Ammo: Test both 110–125gr supersonic for general use and 190–220gr subsonic for suppression; log velocities with a chrono for accurate dope.
Support gear: Two-point QD sling, compact bipod or tripod clamp for prone/zeroing, and 30-rd quality mags marked for .300 BLK only.
Zeroing & Best Practices
Zero distance: Many shooters prefer a 50/200-yard zero with supers; for subs/suppressed, confirm at your typical engagement distance (e.g., 50–75 yards).
Function test: Run your actual defensive/hunting load through multiple mags to verify feeding, ejection, and lock-back.
Witness-mark hardware: Paint-pen optic screws, handguard fasteners, and mount nuts to detect movement after travel or classes.
Safety labeling: Clearly mark .300 BLK magazines to avoid cross-loading with 5.56—never mix calibers.
Maintenance & Care
BCG & gas system: Keep bolt lugs, cam pin, and rails lightly lubricated—especially for suppressed use.
Barrel & crown: Inspect after range sessions; carbon on short barrels accumulates faster around the muzzle.
Handguard & rail: Verify M-LOK fastener torque periodically, especially after heat cycles.
Compliance & Safety
Confirm local/state/federal laws regarding barrel length, suppressors, and transport.
Follow all firearm safety rules; ensure the firearm is unloaded before maintenance or configuration changes.
Validate zero and reliability before field or defensive use.
SEO Highlights (For Shoppers & Merchandisers)
Primary Keywords: CMMG BANSHEE Mk4 .300 Blackout, 12.5" threaded barrel, EML 7" M-LOK handguard, Tungsten Cerakote, 30AB20FTNG, UPC 810148623661.
Related Keywords: .300 BLK AR-15 pistol/SBR, Black Nitride medium-taper barrel, free-float M-LOK handguard, Picatinny top rail, CMMG ZEROED grip.
Value Propositions: Suppressor-friendly .300 BLK performance, durable Nitride/Cerakote build, compact free-float rail, AR-15 ergonomics, 30+1 capacity.
What’s in the Box
CMMG BANSHEE Mk4 — .300 Blackout, 12.5" Black Nitride barrel, EML 7" M-LOK handguard
Tungsten Cerakote upper/lower receiver set with Picatinny rail
CMMG ZEROED™ grip, magazine (capacity varies by region), owner’s manual & documentation
Contents may vary by distributor—confirm your specific package.
Short, quiet-ready, and uncompromising—the CMMG BANSHEE Mk4 .300 Blackout is built to run hard and hit above its size, whether you’re training, defending, or working the back 40.
"The End"
