The Systema Aluminum FSG1 piston is much stronger than the stock plastic piston and is designed for a heavily upgraded FSG1. Aluminum pistons are much stronger than polycarb pistons but they also don't have as much forgiveness. To go along with a good aluminum piston you should also have a good set of gears, and they must be shimmed very well to avoid premature and uneven wear, and to avoid excess gearbox noise. Since Aluminum is heavier than polycarb it is highly recommended to upgrade stock gearbox shells to reinforced ones.
- This piston is for the FSG1 ONLY! This will not work in regular AEGs.
- The use of aftermarket airsoft parts is not an exact science. Some parts may require fitting even thought they were designed to fit without modification. Professional installation of upgrade parts is highly recommended.