Abstract: Cheek risers for rifles have a shell configured to closely receive at least a portion of the tapered butt, the shell defining a stud aperture configured to receive the stud when the shell closely receives the butt, and an adjustable cheek rest connected to the shell and operable for vertical position adjustment with respect to the shell. The stud aperture may be circular. The stud aperture may be configured to closely receive a sling stud. The shell may have an upper portion and a lower portion selectably and removably connected to each other. The upper portion and lower portion may be unitary and connected via a live hinge. The upper portion and lower portion may include a separable hinge interface on one side, and a connection facility on an opposed side. The separable hinge interface may include a pin element and a hook element configured to engage the pin element.

Abstract: Rifle stock mounting rail systems have an elongated rail having opposed forward and rear ends, the elongated rail having an accessory mounting facility defining a plurality of mounting locations, the elongated rail defining a forward mounting aperture proximate to the forward end, the elongated rail defining a rear mounting aperture proximate to the rear end, the forward mounting aperture being configured to receive a first fastener in a stock aperture associated with a sling stud, the rear mounting aperture being configured to receive a second fastener in a stock aperture associated with a trigger guard, and the forward and rear mounting apertures being spaced apart by a distance based on a spacing between a sling stud and the second fastener. The accessory mounting facility may be an elongated channel. The accessory mounting facility may have a multitude or an unlimited number of mounting locations.

Abstract: Rifle stock mounting rail systems have an elongated rail having opposed forward and rear ends, the elongated rail having an accessory mounting facility defining a plurality of mounting locations, the elongated rail defining a forward mounting aperture proximate to the forward end, the elongated rail defining a rear mounting aperture proximate to the rear end, the forward mounting aperture being configured to receive a first fastener in a stock aperture associated with a sling stud, the rear mounting aperture being configured to receive a second fastener in a stock aperture associated with a trigger guard, and the forward and rear mounting apertures being spaced apart by a distance based on a spacing between a sling stud and the second fastener. The accessory mounting facility may be an elongated channel. The accessory mounting facility may have a multitude or an unlimited number of mounting locations.

Abstract: Rifle stock mounting rail systems have an elongated rail having opposed forward and rear ends, the elongated rail having an accessory mounting facility defining a plurality of mounting locations, the elongated rail defining a forward mounting aperture proximate to the forward end, the elongated rail defining a rear mounting aperture proximate to the rear end, the forward mounting aperture being configured to receive a first fastener in a stock aperture associated with a sling stud, the rear mounting aperture being configured to receive a second fastener in a stock aperture associated with a trigger guard, and the forward and rear mounting apertures being spaced apart by a distance based on a spacing between a sling stud and the second fastener. The accessory mounting facility may be an elongated channel. The accessory mounting facility may have a multitude or an unlimited number of mounting locations.

Abstract: A system and method for using nanoparticles for antimicrobial activity. The coding may include a polymeric film and a plurality of discreet first particles. The discreet particles may include silver metal, silver oxide or a combination of both. The discreet particles may be in contact with the polymeric film.