The bearing spring guide is used in the majority of airsoft guns today and known to let the spring rotate and releases tension. It rotates the piston inside the cylinder and the spring inside the piston, in a way the bearing spring guide act like a spacer to increase fps.
ARES are a well known brand in the Asia market today due to their affordable AEG and sniper rifles. They've been making airsoft guns for awhile and know what the market wants when it comes to affordable yet quality cost guns.
The ARES G36 Bearing Spring Guide is designed only for the ARES G36 system, so please refrain from installing into other platforms. Using this will increase your FPS by a small margin of 20 - 30 give or take. This upgraded spring guide has a core of high-tension steel, making it capable of handling any power spring one could wish to install in the G36. The outer part of the guide rod has a free rotating sleeve made in POM polymer, which protects the spring from unnecessary wear and heat build up, as well as minimizing friction. In combination a supported pressure bearing this spring guide will handle any power level of springs installed and ensure maximum spring lifespan.
