Abstract: A gas piston according to various aspects of the present technology comprises a helical groove disposed along an exterior surface. The helical groove may comprise curved edges at transitions between a crest and root of the helical groove. The helical groove allows for easier movement of the gas piston within its operating cylinder, provides enhanced resistance to particulate build up, and improves firing accuracy.

Abstract: A gas piston according to various aspects of the present technology comprises a helical groove disposed along an exterior surface. The helical groove may comprise curved edges at transitions between a crest and root of the helical groove. The helical groove allows for easier movement of the gas piston within its operating cylinder, provides enhanced resistance to particulate build up, and improves firing accuracy.

Abstract: Methods and apparatus for flash suppression according to various aspects of the present technology may comprise a body that is configured to be selectively coupled to a firearm. The body may be formed with curved and or arcing protrusions extending longitudinally along the body. Each protrusion is separated from another protrusion by a gap configured to dissipate gases and unburned materials exiting the barrel of the firearm.

Abstract: A baffle for use in a firearm sound suppressor is provided. The baffle defines a central bore extending from a first face of the baffle to a second face and sized to allow a projectile fired from a firearm to freely pass along a longitudinal axis of the baffle. A plurality of grooves are defined in the first face and a plurality of channels are defined in the second face. Each groove begins adjacent to or near the peripheral wall and extends from the first face towards the second face and the central bore along a groove axis and each channel begins adjacent to or near the peripheral wall and extends s from the second face towards the first face and the central bore along a channel axis. Each groove of the first face can be substantially aligned with a channel of the second face. The baffle can be one of a plurality of baffles in a baffle stack.

Abstract: A rectangular barrel-like structure having four wooden stave sides and two wooden stave head sections, joined together by specially designed triangular corner members. Each of the staves used in making the side walls and in making the head sections are of white oak and are of tongue-and-groove construction. Additionally, each of the staves utilized in the wall sections contains a croze at the top and at the bottom for snug engagement with the staves forming the head sections. Each of the triangular corner members is truncated at the junction of the leg and the base of the triangle so as to form a planar section equal in width to the width of the wall section stave. The truncated planar section contains a projecting tongue on one side for engagement with a complementary groove of a wall stave of one side section and a complementary groove on the other for engagement with a projecting tongue of one of the wall staves of the other wall section.

Abstract: A new cultivar of Hibiscus, Hibiscus syriacus ‘Jodi,’ characterized by three color irregular variegation (Dark green, light green, and golden yellow); a large, pure white flower; a longer blooming duration; two additional seasons of ornamental qualities because of variegated leaves; and triploid (sterile) genetic character.