Shop › SCO O-RING BOOSTER PACK SCO O-RING BOOSTER PACK $7.65 SilencerCo O-Ring Booster Pack, Fits Osprey and Octane, Contains Two O-Rings AC88 Quantity: Add To Cart Added! SilencerCo O-Ring Booster Pack, Fits Osprey and Octane, Contains Two O-Rings AC88