Ammunition magazine

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,

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.

2 . The magazine follower of claim 1 , wherein the concave surface is sized and shaped to receive at least a portion of a 5.7×28 mm ammunition round.

3 . The magazine follower of claim 1 , wherein the concave surface is sized and shaped to receive at least a portion of a 4.6×30 mm ammunition round.

4 . The magazine follower of claim 1 , wherein the tail fin has a width of about 25% to about 50% of an overall width of a corresponding magazine housing.

5 . The magazine follower of claim 1 , wherein a lateral side of the front leg is configured to contact an inner surface of the corresponding magazine housing.

6 . The magazine follower of claim 1 , wherein a lateral side of the front ridge is configured to contact an inner surface of the corresponding magazine housing.

7 . The magazine follower of claim 6 , wherein the lateral side is configured to contact a region of the inner surface of the corresponding magazine housing between two slots configured to enable passage of bullet tips stored within the corresponding magazine housing.

8 . The magazine follower of claim 1 , wherein one or more lateral sides of the rear leg are configured to contact an inner surface of the corresponding magazine housing.