US12578157 - Ammunition magazine

The patent describes an ammunition magazine designed for bottom-loading specific rounds into standard AR-15 or M16 upper receivers. It features a magazine follower with a unique design that accommodates the 5.7×28 mm and 4.6×30 mm ammunition rounds.

Claim 1

1 . A magazine follower comprising: a cartridge-shaped protrusion on a top surface, a concave surface on the top surface and disposed adjacent to the cartridge-shaped protrusion, a front leg including a front ridge disposed vertically along the front leg, a rear leg disposed generally opposite the front leg, a pair of lateral recesses configured to slidably mate with two opposing lateral tines of a corresponding magazine housing, and a tail fin disposed adjacent the rear leg and configured to slidably mate with a tail recess of the corresponding magazine housing, a cartridge-shaped protrusion on a top surface, a concave surface on the top surface and disposed adjacent to the cartridge-shaped protrusion, a front leg including a front ridge disposed vertically along the front leg, a rear leg disposed generally opposite the front leg, a pair of lateral recesses configured to slidably mate with two opposing lateral tines of a corresponding magazine housing, and a tail fin disposed adjacent the rear leg and configured to slidably mate with a tail recess of the corresponding magazine housing, wherein the concave surface is sized and shaped to receive at least a portion of a 5.7×28 mm ammunition round or a 4.6×30 mm ammunition round.

Google Patents

https://patents.google.com/patent/US12578157

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12578157