Spring guide bearing in Ergal for M4 SRE Marui - FPS (GM4S)
The shape of the rod makes it compatible with most springs on the market.
The nickel-plated AVP spring guide base provides high strength to the pins and solidity to the rear structure of the GEAR BOX.
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Spring guide bearing in Ergal
for M4 SRE Marui.
Brand FPS (GM4S)
100% compatible with MARUI
100% MADE IN ITALY
Ergal bearing spring guide for new generation MARUI M4 SRE gear box (GM4S).
The shape of the rod makes it compatible with most springs on the market today.
The ergal rod is hard anodized 40 to ensure high performance and long life.
Increase the speed of the ball by 2/3 meters per second.