Spring MS170, 74mm, VSR BU, AirsoftGunsMasterSpring (MS170) length 74 mm is mainly for using in cylinder set VSR BU (Bore Up) from series of AirsoftGuns Custom Parts. Spring is made from patented steel wire according to EN 10270-1 class SH for direct requests of service technicians from AirsoftGuns.
MasterSpring (MS) is the weaker level variant of SuperSpring (SS), for users, who require lower performance (cca 180 m/s) and lighter pulling of manual weapon. To achieve greater flexibility and correct returning back to start position we don't use progression winding. Complete spring preload (spaces between each eyes) is set to lowest possible exceed value of the Tau. It determines quality of springs - mainly stability and flexibility for long time. With extreme high value of Tau and rapid weakening/squeezing airsoft springs we unfortunately meet every day during airsoft guns upgrade.
length after full pressing: 74 mm
wire diameter: 1.80 mm
outer diameter: 14 mm
material: EN10270-1SH (standard patented steel)
number of turns: 41
Note: The value of wuzzle velocity were measured at the guns that were upgraded by technicians of AirsoftGuns service department. To achieve the same performance, it is necessary to use quality upgrade parts and is necessary correct and professional installation too. If you're interested in quality upgrade of your airsoft guns, you can contact directly our service department.
If you want to know more how is it with power of springs, we recommend an interesting article about real hardness of airsoft springs and how to mesure them. There you can learn that it is not good to believe label on the packaging of the spring, because the absence of common standards allows manufacturers to mark the spring hardness quite different. It is important to say that the measurement of hardness with our measuring rod can be used only with springs which have the total number of turns about 29 - 32. If is spring out of interval the measuring will be incorrect. It is better to use "weight" method of full pressed spring.