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Home » Internal Parts » Pistons » Polycarbonate Pistons » Systema New Version Polycarbonate Piston for V.II and V.III Airsoft AEG Gear Box » Reviews Systema New Version Polycarbonate Piston for V.II and V.III Airsoft AEG Gear Box [PT-EN-MP-007] $15.00 Displaying 1 to 2 (of 2 reviews) Result Pages:  1  Submited By: Gabriel V. Date Added: Monday 16 March, 2009 it can probably handle an sp140 without stripping, but a 140 spring will put allot of wear and tear on your gun so i wouldn't go past a 130 (a 130 spring will get you about 450fps) Looks like a good piston, should last about 60,000 rounds with a 120 spring (just my estimate) Submited By: Michael S. Date Added: Wednesday 05 November, 2008 Whats the biggest spring that this piston is able to take? and im looking for a systema spring, Thanks Displaying 1 to 2 (of 2 reviews) Result Pages:  1

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