US 12,467,727 B2
Ammunition blank and corresponding bolt
Jacqueline K. McNally, Rochester, NH (US); Johnathon M. Hall, Beebe, AR (US); and Virgil L. White, Cabot, AR (US)
Assigned to Sig Sauer, Inc., Newington, NH (US)
Filed by Sig Sauer, Inc., Newington, NH (US)
Filed on Jan. 3, 2024, as Appl. No. 18/403,178.
Claims priority of provisional application 63/479,408, filed on Jan. 11, 2023.
Prior Publication US 2024/0230293 A1, Jul. 11, 2024
Int. Cl. F42B 8/04 (2006.01); F41A 3/12 (2006.01); F41A 3/26 (2006.01); F41A 15/14 (2006.01); F42B 8/02 (2006.01)
CPC F42B 8/04 (2013.01) [F41A 3/26 (2013.01); F41A 15/14 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A blank ammunition cartridge casing comprising:
a casing base with a proximal end surface;
a casing body defining an inside volume; and
a distal end portion, wherein the casing base defines a primer pocket in communication with the inside volume of the casing body;
wherein the base defines an annular region extending radially outward from the primer pocket, the annular region recessed axially with respect to the proximal end surface by at least 0.014″, and
wherein the primer pocket is sized such that when a primer is installed in the primer pocket that a proximal face of the primer is flush with or recessed axially with respect to a proximal surface of the annular region.