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Systema New Version Polycarbonate Piston for V.II and V.III Airsoft AEG Gear Box
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)

Rating: 5 of 5 Stars! [5 of 5 Stars!]
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