CMMG A0B Mk4 5.56mm Rifle w/ Zeroed 556k Suppressor & 2 MOA Vortex Sparc

The CMMG A0B Mk4 AR-15 rifle, now enhanced with the CMMG Zeroed 556K suppressor and Vortex Optics SPARC AR 2 MOA red dot sight, forms an outstanding suppressed optics-ready package tailored for 5.56mm NATO/.223 Remington versatility. The rifle's 16.1-inch 4140CM SBN barrel with 1:7 twist and rifle-length direct impingement system pairs perfectly with the compact Zeroed 556K suppressor—replacing the included Zeroed muzzle brake (which remains provided)—to deliver substantial noise reduction, minimal muzzle flash, and improved control for faster, more accurate follow-up shots. The premium TriggerTech AR-D 2-stage trigger ensures crisp performance, while the M-LOK handguard offers flexible mounting options, and the Armor Black Cerakote finish with B5 Systems stock provides rugged durability and ergonomic comfort in a lightweight 6.5-pound, 41-inch platform.

The Zeroed 556K suppressor adds just 5.5 inches (5.2 inches without mount) and 13.5 ounces (11 ounces without mount) with its heat-treated 17-4 stainless steel construction, nitride finish, and tubeless laser-welded baffles for excellent sound suppression on 5.56mm and compatible calibers. Full-auto rated, user-serviceable, and HUB-compatible with included 1/2x28 and 5/8x24 direct thread mounts, it maintains the rifle's balance for dynamic handling in training, home defense, or tactical use. Topped with the Vortex SPARC AR 2 MOA red dot, this bundle gains rapid target acquisition through its parallax-free 2 MOA bright red dot, unlimited eye relief, and multi-height mount compatible with AR platforms.

The Vortex SPARC AR features 10 daylight-bright brightness settings (including night-vision compatible low levels), a 50,000-hour AAA battery life with 12-hour auto-shutoff, fully multi-coated lenses for clear sight picture, and rugged, shockproof/fogproof/waterproof construction in a compact 2.9-inch, 7.5-ounce body with 90 MOA windage/elevation adjustments. This complete setup combines CMMG's in-house quality manufacturing with Vortex's legendary reliability and lifetime VIP warranty, delivering a suppressed, red-dot-equipped AR-15 that's ready for any scenario requiring speed, reduced signature, and precision.

Build your ultimate suppressed red-dot AR-15 bundle with the CMMG A0B Mk4 rifle, Zeroed 556K suppressor, and Vortex SPARC AR sight—shop now at Battlehawk Armory!

Rifle Specifications:

• Caliber: 5.56mm
• Operating System: Direct Impingment
• Barrel Length: 16.1"
• Barrel Twist: 1:7"
• Barrel Material: 4140CM, SBN
• Muzzle Device: CMMG Zeroed Muzzle Brake
• Muzzle Thread: 1/2"x28
• Gas Port Location: Rifle
• Gas Block: Adjustable 0.750"
• Handguard: M-Lok
• Finish: Armor Black Cerakote
• Stock: B5 Systems Stock
• Trigger Type: TriggerTech AR-D 2-Stage
• Safety Selector: CMMG Zeroed 60/90 Degree
• Magazine: CMMG 30rd
• Weight: 6.5 lbs
• Length: 41"

Suppressor Specifications: CMMG Zeroed 556k

• Caliber: 5.56mm, 22 ARC, 5.7x28mm, 4.6x30mm
• Finish: Nitride
• Weight:
  • 13.5 oz w/ Mount
  • 11 oz w/o mount
• Diameter: 1.58"
• Length: 
  • 5.5"
  • 5.2" w/o Mount
• HUB Compatible: Yes
• Material: Heat Treated 17-4 Stainless Steel
• Minimum Barrel Length: 
  • 5.7x28mm - 5"
  • 5.56mm - 10.5"
• Mount: 1- 1/2"x28 TPI & 1- 5/8"x24 TPI HUB Mounts
• Full Auto Rated: Yes
• Bore Diameter: .224 Caliber

Red Dot Specifications: Vortex Optics Sparc AR 2 MOA Red Dot

• Magnification: 1x
• Objective Lens Diameter: 22mm
• Reticle: 2 MOA Dot
• Adjustment Graduation: 1 MOA
• Parallax Setting: Parallax Free
• Max Windage Adjustment: 90 MOA
• Max Elevation Adjustment: 90 MOA
• Dot Color: Bright Red
• Dot Size: 2 MOA
• Mount Type: Multi-Height
• Eye Relief: Unlimited
• Length: 2.9"
• Weight: 7.5 oz