Disclaimer: This product is for airsoft, training, and simulation purposes only.  Utilizing Airsoft products improperly, including in real firearm applications, are potentially dangerous and may cause serious injury.  PTS will not accept any responsibility or liability for misuse of this product.

The PTS Mega Arms MKM GBBR series of guns are variation based on the M4/AR-15 platform. The Mega Arms GBBR (Airsoft Gas Blowback Rifle) represents the continued evolution of Airsoft guns as training systems.

The PTS GBBR series of Airsoft guns features the same firearms manipulations and functions as found on real AR15 firearms.

Precision machined and engineered, the PTS Mega Arms MKM GBBR is a perfect training gun for the shooter who desires realistic firearms manipulation, the reliability of PTS training products and the unique style that only Mega Arms can envision.

Core Features:

  • Gas operated recoil blowback
  • Realistic construction and field stripping
  • Functional bolt catch and release
  • Functional forward assist
  • Semi and full auto select fire modes
  • Adjustable hop-up

Special Features:

  • PTS Mega Arms GTR-3H Billet Lower Receiver with flared magazine well
  • PTS Mega Arms MKM AR-15 Billet Upper Receiver with KeyMod handguard
  • Compatible with all standard KeyMod accessories
  • Ultra lightweight design
  • PTS EP Back Up Iron Sights (EP BUIS)
  • PTS Mega Arms Skeletonized Trigger
  • Black hard anodized finish
  • Exclusive Mega Arms LLC licensed product
  • Collapsible stock


  • Caliber: 6mm 
  • Magazine Capacity: 40 rounds 
  • Gas System: Force Velocity [FV] 
  • Propellant: Green Gas 


  • Inner Barrel Diameter: 6.05 mm
  • Inner Barrel Length: 370 mm
  • Outer Barrel Length: 36.83 cm [14.5"]
  • Overall Length (Retracted):  81 cm [32"]
  • Overall Length (Extended):  89 cm [35"]
  • Weight: 7 kg [15.5lbs]


  • Rate of fire: 13+ RPS
  • Velocity: 110-116 MPS [360-380 FPS]
  • Energy Output with 0.20g BB:  1.20 Joules


**This airsoft replica is manufactured under authorized Mega Arms license. Mega Arms® logo and related brand names are trademarks of Mega Machine Shop, Inc.in the United States and/or other countries.


SKU: MG002680307