CMMG RESOLUTE® MK4 — .300 AAC Blackout, 16.1" Barrel, 30-Round | Midnight Bronze Cerakote® | Model 30AE70A-MB / 30AE70AMB | UPC 810144724065
A Versatile .300 BLK Carbine Tuned for Modern Performance
Step into a do-everything .30-cal AR with the CMMG RESOLUTE® MK4 in .300 AAC Blackout. Built around a 16.1-inch threaded barrel and a free-float M-LOK® handguard, this RESOLUTE delivers the modularity you want for lights, grips, and sling points—while the Midnight Bronze Cerakote® finish shrugs off weather and hard range use. Pair your preferred optic on the Picatinny top rail, feed it subsonic or supersonic .300 BLK, and enjoy reliable cycling in a rifle that’s equally at home in training classes, thick-cover hunts, or property defense.
Caliber: .300 AAC Blackout (300 BLK) • Barrel: 16.1" (threaded*) • Capacity: 30+1 (where legal) • Finish: Midnight Bronze Cerakote® • Platform: MK4 (AR-15 pattern) • Models: 30AE70A-MB / 30AE70AMB • UPC: 810144724065
*Thread Pitch: Most .300 BLK barrels use 5/8×24—always verify your serialized spec card before buying a muzzle device or suppressor mount.
Why Choose the RESOLUTE MK4 in .300 BLK?
Supers & Subs, One Rifle
.300 Blackout was designed to run everything from quiet, controllable subsonics (with a properly configured muzzle device or suppressor, where legal) to flat-shooting supersonics for hunting and duty roles. One rifle, many missions.
16.1" “Just Right” Barrel
The 16.1-inch length offers excellent balance: enough dwell and velocity for dependable performance, yet still nimble for home/property defense and tight terrain.
Free-Float M-LOK® Precision
The free-float handguard protects barrel harmonics for repeatable point of impact and gives you real estate to mount a white light, hand stop, QD sling cups, or a bipod—without extra bulk.
Optics-Ready Picatinny Rail
Run a micro red dot for speed or an LPVO (1-6× / 1-8×) for reach. The continuous top rail keeps setup simple and secure.
Midnight Bronze Cerakote® Durability
The low-glare Midnight Bronze coating resists abrasion and corrosion, cleans easily, and looks premium paired with black furniture and accessories.
Small parts like charge handle, trigger, muzzle device, and handguard length/profile may vary by production run. Check your box label for exact configuration.
Key Features at a Glance
Caliber: .300 AAC Blackout (300 BLK)—optimized for subsonic & supersonic use
Barrel: 16.1", threaded* for brakes/comps/suppressor mounts
Receiver Set: MK4 AR-15 pattern with Midnight Bronze Cerakote®
Handguard: Free-float M-LOK® for modular accessory mounting
Top Rail: Picatinny optics-ready
Controls: Familiar AR ergonomics & manual safety
Capacity: 30 rounds (where permitted)
Models / UPC: 30AE70A-MB / 30AE70AMB • 810144724065
*Verify 5/8×24 thread pitch on your serialized spec card.
What You’ll Notice on the Range
Predictable, Trackable Recoil
With .300 BLK’s tuned impulse and a quality muzzle device, expect fast follow-up shots and smooth transitions between targets.
Consistent Zero & POI
Free-float geometry helps maintain point of impact even when loading into a sling or barricade, or after adding accessories.
Role-Ready Modularity
From low-light defense to thick-cover hunting, the M-LOK® forend and Picatinny rail let you purpose-build without gunsmithing.
Ideal Use Cases
Home & Property Defense: Compact overall feel with effective .30-cal bullet choices
Hunting in Brush/Timber: Short OAL feel and excellent terminal options at practical ranges
Suppressed Setups (Where Legal): Subsonic-friendly cartridge + threaded barrel
Training & Classes: Durable finish, AR familiarity, and easy maintenance for high round counts
Smart Setup Recommendations
Optic: Micro red dot for speed or LPVO 1-6× / 1-8× for flexibility
Light: Compact M-LOK® weapon light with momentary/remote switch
Sling: Two-point QD sling; add QD cups at preferred positions
Muzzle Device: Confirm thread pitch; pick a brake/comp or suppressor mount to suit your role
Ammo: Zero with your intended load (supers vs. subs). Confirm function and point of impact with both.
Technical Specifications (General)
Platform: CMMG RESOLUTE® MK4 (AR-15 pattern)
Caliber: .300 AAC Blackout
Barrel Length: 16.1 inches, threaded (verify pitch)
Handguard: Free-float M-LOK® (length may vary by run)
Receivers/Finish: Aluminum, Midnight Bronze Cerakote®
Controls: AR-standard safety, mag release, and charging interface
Capacity: 30+1 (where legal)
Model Numbers: 30AE70A-MB / 30AE70AMB
UPC: 810144724065
Frequently Asked Questions
Q: Will this run both subsonic and supersonic .300 BLK?
A: Yes. .300 BLK was created for both. Always function-test with your chosen loads—especially if you change muzzle devices or run suppressed.
Q: What magazines should I use?
A: Standard AR-15/STANAG magazines. Mark your .300 BLK mags to avoid dangerous 5.56/.300 mix-ups.
Q: What’s the muzzle thread pitch?
A: Most .300 BLK rifles use 5/8×24, but verify on your specific rifle before purchasing devices or mounts.
Q: Gas system length?
A: May vary by batch. Check your rifle’s serialized spec card or product label for the exact configuration.
SEO-Rich Highlights & Buyer Keywords
CMMG RESOLUTE MK4 .300 Blackout rifle with 16.1" threaded barrel
Midnight Bronze Cerakote finish, free-float M-LOK handguard
Optics-ready Picatinny rail, 30-round capacity (where legal)
Multi-role supersonic/subsonic .300 BLK carbine for defense, hunting, and training
Model 30AE70A-MB / 30AE70AMB, UPC 810144724065
Meta Title (SEO)
CMMG RESOLUTE MK4 — .300 Blackout, 16.1" Barrel, M-LOK, Midnight Bronze | 30AE70A-MB
Meta Description (SEO)
Build a flexible .300 BLK carbine with the CMMG RESOLUTE MK4: 16.1" threaded barrel, free-float M-LOK handguard, optics-ready Picatinny rail, and Midnight Bronze Cerakote finish. 30-round capacity (where legal). Model 30AE70A-MB / 30AE70AMB, UPC 810144724065.
Structured Data (Product Schema JSON-LD)
Responsible Use & Compliance Reminder
Always follow local, state, and federal laws regarding barrel length, threaded muzzles, suppressors, and magazine capacity. Verify thread pitch and included parts on your product label, confirm reliability with both supersonic and subsonic loads, and practice safe handling and secure storage.
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