MAXX Model Double O-Ring Ball Bearing AEG Piston Head Features Precision cnc machined aluminum construction double o-rings helps to prevent piston head from scraping the inside of your cylinder improved durability ported cylinder head smooth steel ball bearings compatibility: most version 2 aeg gearboxes assists in firing consistent fps with...

Element O-Ring Set (10pcs each) Ensemble de O-ring, 10 pièces par grandeur. 10 pieces for each size, O-ring set.