The Laylax VSR-10 Zero Trigger. The standard VSR-10 trigger upgrade for your Tokyo Marui sniper rifle. Fits on VSR-10 guns only. For use on heavily upgraded rifles, to withstand the higher pressure springs. Like, if you have the 150-190% springs, you MUST have this trigger assembly, or your gun may not work properly. If you don't use the Zero trigger, you may not be able to pull the trigger or it'll be extremely difficult - leading to premature breakage of the sear. So, pick this new trigger up and have your perfect airsoft sniper rifle!