I'd like to revive this topic if I may.
I've only just jumped into the GBB rifle club, bought a Viper XM177E2 the last week of December 2010 and have some issues with it that are more than likely due to cold temps, (Montana), and my lack of knowledge of the GBB rifle. I'm a competent AEG tech and have replaced the slides on my TM Glocks with metal ones, but no real GBB skills.
I'm in contact with a couple of Viper-knowledgeable folks in Taiwan and in Spain so I'm confident I'll sort the Viper out in time...GHK makes what is reputed to be a good CO2 mag.
All of my research led m
