Abstract: A shotgun includes a first barrel having a first barrel muzzle end and a second barrel having a second barrel muzzle end. The shotgun includes an expansion joint provided adjacent the first barrel muzzle end and the second barrel muzzle end to connect together the first barrel muzzle end to the second barrel muzzle end. The expansion joint is operative to allow movement of one of the first and second barrels relative to the other one of the first and second barrels to prevent bowing thereof.

Abstract: A fill, infill or propant material used in an artificial turf application includes glass particles having an irregular shape and smoothed surfaces. An artificial turf includes: a base; a carpet of synthetic grass fibers on the base; and a fill material dispersed between and supporting the fibers; the fill material including glass particles having an irregular shape and smoothed surfaces. A method of producing a fill material for use in an artificial turf includes: providing glass particles having an irregular shape and sharp surfaces; and smoothing the surfaces of the particles through a chemical, mechanical or thermal process or a combination of these processes.