The airsoft gun 552 models available today use the version three modified type gear box. Most of the internal parts like gears, piston and spring are the same ones your AK, DSR or 36 series airsoft gun might use. I would recommend adding metal bushings and a full metal spring guide with bearings to any V3 gear box that does not already have these airsoft upgrade parts installed. The external parts on the 552 airsoft gun is where things begin to change. The build is rock solid and the field stripping of this AEG is very simple. Be sure and Oil your 552 airsoft gun after each game or heavy target use. Modular airsoft gun upgrade kits are now available to make your airsoft guns Li-Po battery pack ready for amazing high speed airsoft machine gun action. Enjoy the repair pics hope your airsoft gun repair project goes well.

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