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A magazine for storing and feeding ammunition cartridges to a small arms weapon which comprises a casing, a floor plate, a follower, and a magazine spring inside the casing. The magazine spring may comprise a first end connected to the follower, a second end connected to the floor plate, and a plura

A magazine for storing and feeding ammunition cartridges to a small arms weapon which comprises a casing, a floor plate, a follower, and a magazine spring inside the casing. The magazine spring may comprise a first end connected to the follower, a second end connected to the floor plate, and a plurality of coils. Each of the plurality of coils may include a first segment having a first radius, a second segment having a first length adjoining the first segment, a third segment having a second radius adjoining the second segment, the second radius being greater than the first radius, and a fourth segment having a second length adjoining the third segment, the second length being approximately equal to the first length.

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1. A magazine configured for storing and feeding ammunition cartridges to a weapon comprising: a casing which comprises an upper end and a lower end;a floor plate situated near the lower end;a follower adjacent the floor plate; anda magazine spring inside the casing which comprises a first end conne

1. A magazine configured for storing and feeding ammunition cartridges to a weapon comprising: a casing which comprises an upper end and a lower end;a floor plate situated near the lower end;a follower adjacent the floor plate; anda magazine spring inside the casing which comprises a first end connected to the follower,a second end connected to the floor plate, anda plurality of coils, each of the plurality of coils including a first segment having a first radius,a second segment having a first length adjoining the first segment,a third segment having a second radius adjoining the second segment, the second radius being greater than the first radius, anda fourth segment having a second length adjoining the third segment, the second length being approximately equal to the first length,wherein the second radius divided by the first radius defines a coil ratio, and the coil ratio is between approximately 1.1 and approximately 1.5. 2. The magazine of claim 1, wherein the magazine spring is preloaded for a force of approximately 15 N at a reference length of approximately 180 mm. 3. The magazine of claim 2, wherein the magazine spring has a solid height that is less than or equal to approximately 25 mm. 4. The magazine of claim 1, wherein the second radius is approximately 8.1 mm. 5. The magazine of claim 4, wherein the first radius is approximately 6.5 mm. 6. The magazine of claim 5, wherein the magazine spring is formed from a round wire. 7. The magazine of claim 6, wherein the round wire has an outer diameter of approximately 1.5 mm. 8. The magazine of claim 7, wherein the round wire is music wire per ASTM A228. 9. The magazine of claim 1, wherein the magazine spring is preloaded for a force of approximately 15 N at a reference length of approximately 75 mm. 10. The magazine of claim 9, wherein the magazine spring has a solid height less than or equal to approximately 20 mm. 11. The magazine of claim 9, wherein the second radius is approximately 8.1 mm. 12. The magazine of claim 11, wherein the first radius is approximately 6.1 mm. 13. The magazine of claim 12, wherein the magazine spring is formed from a round wire. 14. The magazine of claim 13, wherein the round wire has an outer diameter of approximately 1.5 mm. 15. The magazine of claim 14, wherein the round wire is music wire per ASTM A228. 16. The magazine of claim 1, wherein the casing is configured and dimensioned to store a plurality of ammunition cartridges for a small arms weapon. 17. The magazine of claim 16, wherein the casing is configured and dimensioned to store 30 or fewer ammunition cartridges. 18. The magazine of claim 16, wherein the casing is configured and dimensioned to store 10 or fewer ammunition cartridges. 19. The magazine of claim 16, wherein the casing is configured and dimensioned to store 5.56×45 mm NATO cartridges. 20. The spring of claim 16, wherein the casing is configured and dimensioned to store .223 Remington cartridges.