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The Modify Polycarb piston head is a great upgrade that will increase the efficiency of airflow through the cylinder. This piston head has ports on the front to push out the o-ring as it moves forwards, this ensures that all of the air in the cylinder is being pushed out to propel the BB. The ball bearings help reduce tension created by the spring compressing and expanding, this combined with a ball bearing spring guide is the optimal set up to keep your spring in good shape.
2009-09-04 12:45:38 K. JOHNSON verified buyer
For: Modify Polycarbonate Piston Head w/ Bearings
it is a nice piston head but the o-ring it comes with is to tight and gets zero compression. You have to replace the o-ring with the one off your old piston head. Thanks to the bearings my shots are more consistent. If you dont mind replacing the o-ring then its a good buy.
$6 cheaper than systema piston head
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