Compact firearm spring arrangement

摘要

A compact firearm spring arrangement within a firearm magazine utilizes two or more springs connected in a linear arrangement by a connecting cup that allows one spring to compress within the other, thereby resulting in a free length spring system having a reduced height when fully compressed while maintaining sufficient force for operation of the firearm. The reduced height of the spring when fully compressed allows for additional bullet storage space within a magazine of standard size or, alternatively, a more compact system within a magazine that provides an equal amount of bullet storage space while reducing the friction of operation of the firearm.

主权项

1. A magazine for storing bullets for use by a firearm, said magazine comprising:
a tube defining an interior chamber of the magazine, said tube having a bottom plate and an open top, and said tube being sized and configured for storing at least one bullet in position for use by the firearm; a follower for supporting said at least one bullet in position to be loaded into the chamber of the firearm, and said follower being sized and configured to move within the interior chamber; a primary compression spring formed from a coiled wire having a first end and a second end, the first end being in communication with said follower, and said primary compression spring being structured and disposed for compressing when a bullet is inserted into said tube and expanding when a bullet exits said tube; at least one secondary compression spring formed from a coiled wire having a first end and a second end, the first end being in communication with the bottom plate of said tube, said at least one secondary compression spring having a smaller diameter than the diameter of said primary compression spring, and said at least one secondary compression spring being structured and disposed for compressing when a bullet is inserted into said tube and expanding when a bullet exits said tube; a connecting cup having an interior compartment surrounded by an outer rim extending from the base of said connecting cup, and said connecting cup being structured and disposed for securing the second end of said primary compression spring against the outer rim of said connecting cup and the second end of said at least one secondary compression spring in the interior compartment of said connecting cup; said at least one secondary compression spring being compressible within the compartment of said connecting cup and said connecting cup fitting within the hollow interior channel formed by the coiled wire of said primary compression spring; and wherein the outer rim of said connecting cup comprises a plurality of flanged prongs extending from the base of said connecting cup and surrounding the interior compartment of said connecting cup, and said plurality of flanged prongs engaging the hollow interior channel of said primary compression spring until the second end of said primary compression spring snaps into the outer rim of said connecting cup.