This is an upgraded hard recoil unitwith brass bolt carrier and aluminium buffer spring guide that is now available at eHobby Asia, and they call it the Super Version. Calling all Super Friends with Super Budgets to get this Super weapon for US$593.00 (shipping costs not included though)... "SUPER VERSION!! WA M4A1 Carbine Gas Blow Back Airsoft Rifle. SUPREME craftsmanship & TOP NOTCH finishing by Western Arms Airsoft. 

NEW SUPER VERSION Features:

• Stronger Blow Back action by brass weight bolt carrier
• Machined Aluminum Buffer Spring Guide
• Heavy Duty Magazine(R-Type)
• Bulls-Eye Hop Barrel

Main Features:

• Western Arms "MAGNA" Blow Back System offer same recoil as pistol
• Rigidity Glass Fiber Reinforced Polymer Receiver with Laser Marking
• Die-Casting Metal Processing & Realistic Field Stripping
• Aluminum Made real size buffer tube
• Can Fit Real Steel Butt Stock
• Fiber Polymer Made Delta Type Handguard
• Functional Metal Bolt Carrier
• 4 Position Extendable Telescope Stock
• Safety Empty Shooting Mode allows you to enjoy the Recoil Feeling without firing bullet

• Full Metal Gas Operated 50rd Magazine (R-Type, Heavy Duty)
• Detachable carry handle reveals a weaver rail (20mm) for any scope or red dot sight
• New Adjustable HOPUP Dial located inside Handguard
• Aluminum Made 14mm Clockwise barrel extension tube
• Include Flash Hider & Silencer
• Sling mount can be installed with any single, 2- or 3- point tactical sling
• Remember to check out our Store for accessories

IMPORTANT NOTE:

1. This NEW WA M4 GBB Airsoft Gun assembly is extremely sophisticated. DO NOT attempt to dissemble the gun without consulting us. No Guarantee will be honored if the gun has been dissembled.

2. HFC134a airsoft gas is recommended. Although HFC22 Green Gas/Top Gas can be used for WA Gas Blow Back, it is NOT RECOMMENDED because the internal mechanism is designed for HFC134a airsoft gas. It may not withstand the prolonged high pressure of higher power gas. Please note No Guarantee will be honored if the gun has been fired with HFC22 Green Gas/Top Gas.