The 2.0 version is highly believed to strengthen rate of fire and induced better performance with its brand new gas system.  It is made up of full metal yet way lighter than the gen one and also offers better quality and durability with its nitride manganese phosphate surface treatment.  It feeds on green or red gas to fire 40 rounds of 6mm BBs.

Specifications:

• Type: Gas
• Capacity: 40 rounds
• Bullet Type: 6mm BB
• Net Weight: 686g
• Material: Metal made, nitride manganese phosphate treatment surface.
• Compatible: M4 Series Airsoft Gas Blow Back GBB Rifle/ Also work with Viper Tech, In katsu, and others WA system GBBR.