Prototype division is a new production line of SRU brand.

SRU apply 3D-weaving technology on manufacturing. This way leads concepts boom out with no limitation, also makes it much more faster to push theses amazing ideas from SRU design house into the market.

SRU M712 Classic Advanced Design Kit With Flow Stock for WE M712 GBB
3D Printing Technology Bullpup kit
Include Slide, Pistol Grip, Magazine Extention (Non Function) & Extenable Stock
Innovation Shape & Detail Marking
Suitable for WE M712 Series Airsoft Gas Blow Back GBB Pistol

Package Not Include Pistol, RDS & Silencer