Back in the day, I had done a couple PSG-1 upgrades with the Systema full tune up kits, both from new PSG-1’s. These kits are OE, and in perfect condition. You’ll get the following; - 2x TM PSG-1 Bevel, Spur, and Sector gears - 2x TM PSG-1 Pistons - 2x TM PSG-1 Standard m110-ish springs - 2x TM PSG-1/AK74series Piston heads *to be clear: these are OE TM PSG-1 piston heads BUT Marui used this design for their newer AK series AEG’s. - 2x TM PSG-1 Cylinders - 2x TM PSG-1 Cylinder heads - 2x TM PSG-1 Air nozzles - 1x TM PSG-1 Tappet plate spring - 2x TM PSG-1 Spring guides I’m asking 80 for both sets, and I’ll cover shipping costs.