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 M870 Tactical Handguard
3D Printing Technology Handguard
Innovation Shape & Detail Marking
Designed for Tokyo Marui/ GE M870 Gas Version Shotgun