Abstract: An impeller for an active-feed paintball loader has resilient arms that engage paintballs in the lower portion (well) of the loader and advance them to and through the outfeed tube. The resilient arms are sufficiently stiff to move unobstructed paintballs located between the arms, and sufficiently flexible to yield when forced against stationary paintballs so as not to rupture the paintball shells, the arms substantially returning to their original shape when the obstruction is removed. Accordingly, when the motor is shut off, the arms will simply flex backward as they encounter stationary paintballs. Should a paintball jam occur in the vicinity of the impeller, the arm(s) can flex around the jammed ball without breaking it, and help to dislodge it so as to clear the jam.

Abstract: A cocking knob and striker assembly for a gas-powered projectile firing device (e.g., a paintball marker). The cocking knob is adapted for operative connection with the striker and has a rearwardly facing spring seat adapted to engage the striker spring. Spring pressure on the cocking knob keeps it engaged with the striker. The arrangement affords easier disassembly and reassembly of the parts.

Abstract: A cocking knob and striker assembly for a gas-powered projectile firing device (e.g., a paintball marker). The cocking knob is adapted for operative connection with the striker and has a rearwardly facing spring seat adapted to engage the striker spring. Spring pressure on the cocking knob keeps it engaged with the striker. The arrangement affords easier disassembly and reassembly of the parts.

Abstract: A universal electronics system has a body adapted to be removably mounted at the muzzle end of the barrel of almost any paintball marker. A pair of spaced detector units signal the time it takes for a paintball to pass through a portion of the body. A muzzle velocity calculating device converts the detector signals to a muzzle velocity, which is displayed on a display screen. The universal electronics system may further comprise a ball counter, a player counter, a clock, a chronometer that records elapsed time, a timer for recording time remaining in a game, and a thermometer. All of the data can be displayed on the display screen.

Abstract: A gas-powered paintball gun has two pressure regulators which supply two different gas pressures for gun operation: a lower-pressure gas for quickly but gently loading balls into the chamber of the gun, and a high-pressure gas for consistently and efficiently propelling balls out of the barrel. A further aspect of the invention resides in the arrangement of the bolt under a removable cover, which gives easy access to the bolt, the breech and the barrel to enable these parts to be cleaned without major disassembly of other parts of the gun.

Abstract: A gas-powered paintball gun has two pressure regulators which supply two different gas pressures for gun operation: a lower-pressure gas for quickly but gently loading balls into the chamber of the gun, and a high-pressure gas for consistently and efficiently propelling balls out of the barrel. A further aspect of the invention resides in the arrangement of the bolt under a removable cover, which gives easy access to the bolt, the breech and the barrel to enable these parts to be cleaned without major disassembly of other parts of the gun.

Abstract: Apparatus for playing a sport or game, comprises a plurality of elongate members disposed upon a playing surface, at least some of said elongate members comprising tubular members, some of said tubular members being disposed in a vertical disposition and some being mounted between a vertically disposed member and the ground, to form an angle with respect to the ground, wherein the arrangement of tubes presents an environment for playing the sport or game in which players can move on the ground surface between tubes to be at least partially hidden by tubes from opposing players.