Ergal Bearing Spring Guide For M4 Sre Marui Recoil Fps (fps-gm4s)
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Reinforced spring guide.
ERGAL material and hard anodised.
It guarantees maximum performance and long life.
It will increase the BB's speed of 2/3 meters per second.
For the TOKYO MARUI M4 SRE RECOIL SHOCK series.
100% MADE IN ITALY.