Patent ID: 11920895
Assignee: ARDESA, S.A.
Field: Other special machines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 11:
12. A firearm and ammunition combination comprising:
a rifle receiver;
a barrel having a barrel breech end and a muzzle end, said muzzle end configured for receiving a projectile;
said barrel breech end having a chamber to receive a cartridge or propellant charge case, wherein the chamber extends through the barrel breech end to a narrowing portion in the barrel, said narrowing portion having a smaller diameter than a largest diameter of said projectile, such that loading said projectile into the barrel from said barrel breech end, or inserting said projectile into said chamber from said muzzle end is physically prohibited;
a propellant charge case insertable within said chamber, said propellant charge case having a two-piece construction comprising:
a cylindrical casing body having a forward end, a back end, and a central axis, said casing body enclosing a propellant charge of predetermined amount; and
a base at the back end of said casing body, said base having a top surface, said base including:
a central aperture within said base top surface for receiving a primer or percussion cap, said central aperture extending to said propellant charge;
an insert portion including a forward narrow portion, a portion of said insert portion inserted within said casing body;
a rim radially extending outwards from said central axis, said rim having a forward surface facing said cylindrical body forward end, said rim forward surface in flush mechanical contact with said barrel breech end when said propellant charge case is inserted within said barrel breech end;
a slot or gap located adjacent to, and axially distanced from, said rim forward surface in a direction of said base top surface, such that said slot or gap is exposed outside said barrel breech end when said propellant charge case is inserted within said barrel breech end; and

an extractor having an extractor extension, prong, or protrusion, said extractor extension, prong, or protrusion insertable within said slot or gap.