Custom spring guide for gearboxes od M249 airsoft guns. It is made at CNC machining center out of EN AW 7075 aluminium. Spring guide is equipped wit axial bearing which avoids spring distorting.
Upgrade your plastic spring guide to the FPS Ergal Ball Bearing Spring Guide for Beretta ARX 160 Gear Box Version (GM160E).Plastic spring guides can b..
FPS ergal ball bearing spring guide for gear box MARUI M4 SRE next gen (GM4S).Upgrade your plastic spring guide to the FPS ergal ball bearing spring g..
FPS ergal ball bearing spring guide for MARUI SCAR SRE (GMSS).Upgrade your plastic spring guide to the FPS ergal ball bearing spring guide for gear bo..
Upgrade your plastic spring guide to the FPS Version 2 Ergal Ball Bearing Spring Guide with round pins (GM2EPT).Plastic spring guides can break easily..
Upgrade your plastic spring guide to the FPS Version 2 Ergal Ball Bearing Spring Guide (GM2E).Plastic spring guides can break easily, especially on up..