The Side Winder mecha from NCsoft's Exteel shooter game, designed by Just Paper (Korea).
Download is on the bottom left corner of their page (see pic below), click the first option right under where it says "Exteel Zone". This is not a dial-up friendly papercraft ^^ you'll get two files, one is the 23 page papercraft template and the other is a 12 page instruction manual, both weigh in at a hefty 88MB.
Exteel Side Winder Mecha Papercraft
Gurren Lagann Mecha Papercraft [Related Posts]
SD Freedom Gundam Papercraft
Ryujinmaru Mecha Papercraft
Mecha Papercraft - Karmis
SD Walker Galliar Papercraft