System and method for magazine with folded feed lips
A magazine for use in a firearm includes first and second feed lips having folded portions to reinforce the strength of the respective feed lips. In some embodiments, the strength of the feed lips may be further reinforced by applying one or more welds. The feed lips are capable of withstanding greater amounts of force to avoid failure. Accordingly, the disclosed magazine and method for providing the magazine reduce the “spring back” effect present in conventional magazine feed lips. This removes the additional step of having to over-form the feed lips that is performed when forming a magazine having conventional feed lips. The result is a method for providing a magazine with folded feed lips that are capable of withstanding greater amounts of force to avoid warping, deforming, or other failure, wherein the method for forming the magazine is more accurate, more consistent, and involves fewer steps.
1. A cartridge retention system for use in a magazine, the cartridge retention system comprising:
a housing having an opening and operable to retain one or more cartridges in an interior portion of the magazine;
a first feed lip coupled to and integral with the housing at the opening of the housing, wherein the first feed lip includes a first folded portion, wherein the first feed lip is folded toward the interior portion of the magazine, and wherein the first feed lip is operable to retain the one or more cartridges in the magazine at desired lateral and vertical positions;
a second feed lip coupled to and integral with the housing at the opening of the housing, wherein the second feed lip includes a first leg and a second leg, wherein the first leg extends from the housing toward the first feed lip, and the second leg extends from a U-shaped connector away from the first feed lip and wherein the U-shaped connector couples the first leg to the second leg, and wherein the second feed lip is operable to retain the one or more cartridges in the magazine at the desired lateral and vertical positions; and
a follower disposed in the interior portion of the magazine and operable to bias the one or more cartridges towards the opening of the housing, the follower comprising an engagement member having one or more protrusions operable to engage an annular recess of one of the cartridges to retain the engaged cartridge at a desired horizontal alignment.
2. The cartridge retention system as set forth in claim 1 , wherein the one or more protrusions are bar-shaped.
3. The cartridge retention system as set forth in claim 1 , wherein the one or more protrusions include two hemispherical protrusions each positioned equidistant between a center of the engagement member and a side of the engagement member.
4. The cartridge retention system as set forth in claim 1 , wherein the one or more protrusions include two ramp-shaped protrusions, wherein the two ramp-shaped protrusions increase in height in a direction toward the center of the engagement member.
5. The cartridge retention system as set forth in claim 1 , wherein the one or more protrusions include two semi-hemispherical protrusions each positioned equidistant between a center of the engagement member and a side of the engagement member.
6. The cartridge retention system as set forth in claim 1 , wherein the first feed lip is folded toward the interior portion of the magazine such that a point on the first feed lip and a point on a first interior surface of the housing correspond to two points along a circumference of an imaginary circle having a desired radius.
7. The cartridge retention system as set forth in claim 1 , wherein the second feed lip is folded toward the interior portion of the magazine such that a point on the second feed lip and a point on a second interior surface of the housing correspond to two points along a circumference of an imaginary circle having a desired radius.
8. The cartridge retention system as set forth in claim 1 , wherein the first leg of the second feed lip is straight and unbent; and wherein the second leg of the second feed lip is straight and unbent.
9. A cartridge retention system for use in a magazine, the cartridge retention system comprising:
a housing having an opening and operable to retain one or more cartridges in an interior portion of the magazine;
a first feed lip coupled to and integral with the housing at the opening of the housing, wherein the first feed lip includes a first folded leg and a second leg, wherein the first leg extends from the housing toward a second feed lip, and the second leg extends from a U-shaped connector away from the first feed lip and wherein the U-shaped connector couples the first leg to the second leg, and wherein the first feed lip is operable to retain the one or more cartridges in the magazine at desired lateral and vertical positions;
the second feed lip coupled to and integral with the housing at the opening of the housing, wherein the second feed lip includes a folded portion, wherein the second feed lip is folded toward the interior portion of the magazine, wherein the second feed lip is operable to retain the one or more cartridges in the magazine at the desired lateral and vertical positions; and
a follower disposed in the interior portion of the magazine and operable to bias the one or more cartridges towards the opening of the housing, the follower comprising an engagement member having one or more protrusions operable to engage an annular recess of one of the cartridges to retain the engaged cartridge at a desired horizontal alignment.
10. The cartridge retention system as set forth in claim 9 , wherein the one or more protrusions are bar-shaped.
11. The cartridge retention system as set forth in claim 9 , wherein the one or more protrusions include two hemispherical protrusions each positioned equidistant between a center of the engagement member and a side of the engagement member.
12. The cartridge retention system as set forth in claim 9 , wherein the one or more protrusions include two ramp-shaped protrusions, wherein the two ramp-shaped protrusions increase in height in a direction toward the center of the engagement member.
13. The cartridge retention system as set forth in claim 9 , wherein the one or more protrusions include two semi-hemispherical protrusions each positioned equidistant between a center of the engagement member and a side of the engagement member.
14. The cartridge retention system as set forth in claim 9 , wherein the first feed lip is folded toward the interior portion of the magazine such that a point on the first feed lip and a point on a first interior surface of the housing correspond to two points along a circumference of an imaginary circle having a desired radius.
15. The cartridge retention system as set forth in claim 9 , wherein the second feed lip is folded toward the interior portion of the magazine such that a point on the second feed lip and a point on a second interior surface of the housing correspond to two points along a circumference of an imaginary circle having a desired radius.
16. The cartridge retention system as set forth in claim 9 , wherein the first leg of the second feed lip is straight and unbent; and wherein the second leg of the second feed lip is straight and unbent.