Ever since the announcement of the Viper SR-16 Gas Blowback Series, CWI Airsoft dropped us a quick note that they have both the Viper KAC SR-16E3 IWS Carbine GBB (11.5") and Viper KAC SR-16E3 IWS Carbine GBB (16"). The materials used in these GBBs are said to be durable with 6061 T6 Aluminium Alloy Forging Raw Block & CNC Post-processing which they claim will make these GBBs to be the toughest in the market.

Viper KAC SR-16E3 IWS Carbine GBB (11.5")

Viper KAC SR-16E3 IWS Carbine GBB (16")

And for some entertainment, here are the videos of the production and forging process: