The newest and Baddest Beast in the line of AR’s from WMD Guns.  The world’s first ARs that are fully shielded by WMD’s proprietary NiB-X® nickel boron extreme coating process, providing unmatched reliability and increased functionality—inside and out! This AMBI Beast has been fully redesigned with dramatic cuts, ambidextrous controls and hammer forged barrels to raise the bar once again on AR performance.

Lesser ARs are much more vulnerable to moisture, corrosion, lubricant buildup, and powder fouling. But the 5.56 AMBI Beast from WMD is practically unstoppable, thanks to our NiB-X® coating technology. NiB-X® not only guards against friction and wear, it virtually eliminates feeding problems associated with buildup of lubricant and residue.

The rifle comes with two magazines and is packed in a tactical bag, the Beast is ready for extreme performance in any environment, with MOA potential right out of the box.

  • Billet NiB-X® coated 7075 lightweight Aluminum Receivers
  • Hammer Forged Match Grade Barrel
  • Polished NiB-X® BCG
  • Enhanced NiB-X® 2-stage fire control group
  • Nitrided accent kit
  • NiB-X® coated M-LOK® 15” handguard
  • 6-Position Adjustable Stock
  • Ergo Grip
  • Two 30-round magazines
  • Tactical rifle bag (w/backpack straps) included
  • Made in USA!


The AMBI Beast can also come in an AR Pistol and various calibers (inventory dependent)

10 in stock

Categories: , SKU: NIBX556AMBI


Technical Details

Lower Receiver       


Billet 7075-T6 Aluminum Machined to Mil Spec Dimensions, Ambidextrous Bolt Catch, Ambi Safety Selector, Large Flared Magwell with Front Magwell Finger Grips, Threaded Bolt Catch Pin, Threaded Tension Screw, NiB-X® Nickel Boron Coated For Durability, Nitrided Controls


Upper Receiver       

Billet Mil-Spec 7075-T6 Aluminum with M4 Feed Ramps. Large Bore Ejection Port, Lightening Cuts in Full Length Picatinny Rails And Charging Handle Tab, Patented Ambi Charging Handle, NiB-X® Coated For Lubricity And Durability, Nitrided Ejection Port Cover Door Assembly



Match Grade, Cold Hammer Forged Chrome Moly Vanadium Steel, 1:7 Twist, 16″ Government Profile, Mid Length Gas System, Nitromet QPQ for Extended Life And Accuracy, ½” x 28 Threads On Muzzle



5.56mm NATO


Barrel Extension     

NiB-X® Coated Barrel Extension for Extremely Smooth Locking and Unlocking With The Bolt


Gas System  

Low Profile Gas Block, CNC Machined From 4140 Steel and NiB-X® Finished, Nitromet QPQ Mid Length Gas Tube, Direct Impingement


Muzzle Device         

Nitrided “Door Breacher” Muzzle Break/Compensator


Bolt Carrier Group  

M16 Profile, Mil-Spec MP Tested, NiB-X® Coated for Reliability And Ease Of Cleaning, Properly Staked Gas Key


Fire Control Group 

2-Stage Trigger, NiB-X® Coated, 2 Pound First Stage, 2.5 Pound Break



Carbine Buffer



Optics Ready



Free Float Aluminum, M-LOK® 15″ NiB-X® Coated Tactical Handguard, QD Swivel Connection On Both Sides, MLOK Slots on 90, 180 and 270 Degrees


Receiver Extension

6 Position Mil-Spec 7075-T6 Aluminum, NiB-X® Coated Inside and Out



6 Position Adjustable.  Triangular Cheekwell for Comfort, Rugged Materials For Durability, Rubber-Like Buttplate For Non-Slip Contact Surface, QD Swivel Connection, Collapses to cover entire Buffer Tube


Pistol Grip    

Black ERGO Pistol Grip



Tactical Bag with Exterior Magazine Pockets, Shoulder Backpack Straps, Range Ready.



6.5 lbs



33″ – 36.5″



2 30 Round Magazines 


California Compliant         

No, Add Juggernaut to make CA Compliant – $78