Abstract: An indexing mechanism for a fluid spray gun may include, but is not limited to: a first detent magnet including: one or more radial portions having a first polarity; one or more radial portions having a second opposite polarity; and a central aperture, a second detent magnet including: one or more radial portions having the first polarity; one or more radial portions having the second opposite polarity; and a central aperture, wherein one or more radial portions of the first detent magnet are configured to align with one or more radial portions of the second detent magnet having an opposite polarity to retain the relative rotational positions of the first detent magnet and the second detent magnet.

Abstract: A hobby projectile may include, but is not limited to: a ball-type projectile having a substantially spherical shape and constructed at least partially of a foam material; and a magnetic or magnetizable component. At least a portion of the ball-type projectile may be at least partially coated with a magnetic or magnetizable component or may include magnetic or magnetizable particles and/or fibers embedded therein.