Royal Arms FBG-MK4 NFDD Flash Bang Trainer – Mark IV


Royal Arms FBG-MK4 NFDD Flash Bang Trainer – Mark IV

Basic kit includes:
• 1x Royal Arms impact initiated Safety FlashBang Body reusable (FBG-Mk4)
• 1x Yellow Safety Lever Spoon (FBG-SLPC-Y)
• 10x Flash Bang Cartridge power loads (FBC)
• 100x 12Ga 209 Primers (209)
• 1x Primer Adaptor (FBG-PA)

This product can only be purchased by credentialed account members of law enforcement and approved dealers. For LEO & dealer access please {contact us}

Product Info & Specs

Royal Arms FBG-MK4 NFDD Flash Bang Trainer – Mark IV

The new FBG-MkIV received a major overhaul; all aspects have been redesigned and engineered to withstand the most hostile environments. Based on our Popular FBG-MkII we listened to many top level operators and realized what improvement could be made. We went back to the drawing board and spent countless hours researching and testing different materials in search of a more durable product. We consulted with several metallurgists to create a new more durable impact resistant heat-treated tool steel for our FBG-MkIV.  In turn we increased the impact strength and abrasion resistance by more than 700% over the FBG-MkII. Furthermore we increased the structural integrity of every internal component in all the critical areas. The new chamber threads have been switched from a Metric fine thread to a Quick Lock Acme Stub that acts as a sealed breech upon assembly but allows the user to easily disassemble once initiated. The new acme thread has 300% more thread engagement yet screws together in half the amount of turns compared to the FBG-MkII

  • Increased Impact Strength
  • Increased Abrasion Resistance
  • Quick Lock Acme Threads
  • Reduced Number of Turns
  • Enhanced / Enlarged Critical Area
  • Heat Treaded to Exacting Tolerance
  • Black Melonite Nitride finish for durability


Description:  The FBG4 is a Revolutionary Impact Detonated Flash Bang Training Device which creates 175dB, 4psi of over pressure and 500K CP.   The FBG4  Flash Bang was designed to provide realistic training at a low cost per bang.

History/Background:  The Impact Flash Bang was developed to overcome the shortcomings of traditional M201 Fuse type. Standard M201 fuse type Flash Bangs have a delay of 1.5sec +/- .03 seconds, which creates uncertainty where the flash bang will detonate (anywhere from 1.2 – 1.8 sec).

Our Impact Flash Bang (FBG4) solves all of the problem associated with traditional M201 fuse type Flash Bangs. Our Impact Flash Bangs are not a time delay they are detonated where they strike. The operator can deploy against a Wall, Window, Slider, Car door, Car Window, Second Story, ceiling wall couch or any other object they strike. Our FBG4 is not an explosive, and will never take off like a rocket. Our FBG4 will not become so hot they start fires, they are cool to the touch upon initiation. With the FBG4 you will never have to worry about the fuse separating and injuring personnel. The FBG4 produces a loud bang with minimal smoke eliminating the operational hazard associated with smoke. The most important feature of the FBG4 is its ability to be serviced and re-loaded by the user.

Potential Targets/Applications:  Training Environments, New operator Inoculation, Individual Targets, Prison/Civil Rioters Training, Active Shooter Training, Animal Control/Conditioning. Other Training applications

Primary Users:  Law Enforcement, Military

Incapacitation Mechanism/Technology:  The FBG4 round creates 4psi of over pressure at 175dB and 500K CP brightness, producing controlled and directed impact ensures the safe deployment and use.

Physical Data:
A. Size: Length= 4 1/2 inch,
B. Weight: 300 Grams (universal chamber
C. Payload: 175dB, 4psi of over pressure and 500K CP brightness
D.  Power Requirements: None
E.  Delivery Means:  Hand Held Thrown / Tossed

Documentation Requirements:  It is recommended that officers training records be annotated to indicate proper training of less lethal

Product Information 

Additional information

Weight 4 lbs
Dimensions 4 × 4 × 4 in