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 Advanced Grip Kit for GHK/WE M4 GBB (Black)
3D Printing Technology SR-Q Front Grip
Innovation Shape & Detail Marking
Designed for GHK/WE M4 Series Gas Blow Back GBB Rifle