Cylinder return spring and Recoil spring for your GBB Pistol for the G17 and G18C, M1911 and the Hi-Capa from brands like CowCow, WE and Guarder.
WE WE17 Part No. G-53 Cylinder Return Spring
WE Hi-Capa Part No. 17 Cylinder Return Spring
WE M1911 Part No. 17 Cylinder Return Spring
Guarder KWA17/18C/34 Enhanced Recoil Guide Steel
CowCow Technology RS1 Recoil Spring for Tokyo Marui Hi-Capa GBB Series