Patent ID: 7448325

Claim:
A caseless projectile for firing out of a barrel of a small arms weapon, the barrel being made of a barrel material and having an inner diameter, the projectile comprising: a substantially cylindrical body with first and second axially opposite ends and a cavity extending between the first end and the second end for holding a quantity of propellant, the first end being closed by a nose integral to the body, the cylindrical body having a first outer diameter which is less than the inner diameter of the barrel, the cylindrical body being made of a first material; at least two seals extending about an outer circumferential surface of the body, a primer for igniting the propellant, the primer being supported by the cylindrical body and located inboard of the second end of the cylindrical body, the primer being centrally disposed about a longitudinal axis of the cylindrical body; each seal protruding radially from the body to form a substantial seal against an inner circumferential surface of the barrel and having a second outer diameter greater than the first outer diameter and equal to or greater than the inner diameter of the barrel, the at least two seals being made of a second material; each seal being in the form of an individual ring, the seals being spaced apart along the cylindrical body with a portion of the cylindrical body between the seals being exposed; and wherein the second material is softer than the barrel material, and the first material is harder than the second material.