How to Install an upgrade piston in a VSR10 airsoft gun
In order to install an upgrade piston in a VSR 10 airsoft gun, you will need the following: a screwdriver, an Allen Key, and a Phillips head screw driver. You may need some replacement springs of various sizes. First, separate the receiver and barrel. Remove the bolt. Set it aside. Disassemble the gun, using a screwdriver. Remove all of the pins and screws, until you can pull out the trigger box. Remove all four screws. Separate the trigger box. Make sure that you keep track of all of the pins and screws. You will be able to replace the springs, at this point and re-align it where needed. Reassemble the gun.