One of the fundamental skills of an airsoft technician is adjusting the AOE (Angle of Engagement) of gears.
EPeS shims are here to assist you in this process, they are light but strong at the same time. There is no danger of chipping off the washer or slowing down the piston with a higher weight.
The package includes 3 shims with thicknesses of 2 mm.

Evolution Recon S EMR
AOE spacer 0.5mm
Piston 14 steel teeth
Li-Po 7,4V 1300 mAh – stick battery
Piston head 


