Unscrew the barrel, take off the hopper. Then unscrew all of the medium screws and take the shroud out and the left receiver half off. then lift up the stock out of its set rings and relive pressure on the main spring. Flip the silver connector above the the front and rear bolts. Take it out and lubricate the rubber orings on both the bolts. Use only airtool or paintball lubericants, do not use aerosols like WD40 Clean out any other paint, dirt or grease with a paper towel. Put all of the parts back into place (there are may videos of this) then rescrew the screws in the marker.
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