ID: 31680 (KIT-KJ001)
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Manufacture direct reinforced spare internal parts. Great value, great reliable JG OEM parts. The piston head may be black or white in color depending on batch.CNC Ball Bearing Ver.II / Ver.2 Spring Guide.7mm Ball Bearing set of 6 pcs.OEM Polycarbonate Ball Bearing Piston Head with silent bumper head.
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"This is the best upgrade for the $$ for a KA P90. Beautiful parts. Head works well. Good seal. The spring guide fits perfectly and yes the KA uses all 7mm bushings so these bearings help a lot.
Overall this upgrade added 14-15 FPS and about 2 RPS. (Although i did have to re-shim when adding these bearings so be SURE to add a shim set when ordering this or your headed for grind city). Which for a very low cost upgrade /repair kit was better than expected. I'm guessing the fps came from the better Head and thicker base of the spring guide. The rps from re-shimming and better bearings.
NOTE: If you are ordering this for a KA /KS P90.... also get the tappit plate. No sense at all opening your gear box without throwing out the worthless plastic plate they put in stock.
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