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A magazine for a firearm includes a body having a bottom end, a feed end side walls, first and second end walls, a channel on the first end wall, and vertically extending side ridges on the side walls; and a follower including a ridge configured to mate with the channel in the first end wall of the

A magazine for a firearm includes a body having a bottom end, a feed end side walls, first and second end walls, a channel on the first end wall, and vertically extending side ridges on the side walls; and a follower including a ridge configured to mate with the channel in the first end wall of the body; a plurality of vertically extending side channels configured to mate with the side ridges of the body; and an arcuate feed surface with an end point of a radius defining the arcuate feed surface being laterally offset from a vertically extending centerline of the follower; and a biasing member configured to urge the follower away from the bottom end.

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1. A magazine for a firearm comprising: a body having a bottom end, a feed end opposite the bottom, a pair of opposed side walls, a first end wall connecting the side walls with a channel on an interior surface of the first end wall, and a second end wall opposed to the first end wall and connecting

1. A magazine for a firearm comprising: a body having a bottom end, a feed end opposite the bottom, a pair of opposed side walls, a first end wall connecting the side walls with a channel on an interior surface of the first end wall, and a second end wall opposed to the first end wall and connecting the side walls, and a plurality of vertically extending side ridges, each side ridge positioned on an interior surface of one of the side walls;a follower including: a ridge along a first end wall thereof and configured to mate with the channel in the first end wall of the body;a plurality of vertically extending side channels in sidewalls thereof, the side channels configured to mate with the side ridges of the body; anda concave arcuate feed surface extending along an uppermost surface thereof, an end point of a radius defining the arcuate feed surface being positioned above the uppermost surface and laterally offset from a vertically extending centerline of the follower; anda biasing member positioned between the follower and the bottom of the body. 2. The magazine of claim 1, wherein the end point of the radius is offset from the vertical centerline of the follower by approximately 0.111 inches. 3. The magazine of claim 1, wherein the end point of the radius is positioned approximately 0.912 inches above a bottom surface of the follower. 4. The magazine of claim 1, wherein the radius defining the arcuate feed surface is approximately 0.250 inches. 5. The magazine of claim 1, wherein each side wall of the follower includes a pair of side channels. 6. The magazine of claim 1, further comprising a vertically extending end ridge on an interior surface of the second end wall of the body, and a vertically extending end channel in a second end wall of the follower and configured to receive the vertically extending end ridge as the follower moves vertically within the body. 7. The magazine of claim 1, further comprising a cavity in a bottom surface of the follower and configured to receive an upper end of the biasing member. 8. The magazine of claim 1, further comprising a pair of opposed feed lips angled inwardly and upwardly from feed ends of the sidewalls. 9. The magazine of claim 8, wherein the feed lips are at an angle of approximately 17.4° with respect to the side walls. 10. The magazine of claim 8, wherein each feed lip includes a first sloped portion extending upwardly at an angle from the top of one of the side walls to a second flat portion. 11. The magazine of claim 8, wherein the feed lips define an opening having a height between a top of an end wall of the body and a top of the feed lips of 0.528 inches. 12. The magazine of claim 1, wherein the biasing member is a spring. 13. The magazine of claim 1, further comprising a cutout extending through one of the side walls of the body proximate the feed end of the body. 14. The magazine of claim 1, further comprising a floor plate positioned within the bottom end of the body and configured to engage a bottom end of the biasing member; and a locking plate engageable with the bottom end of the body to retain the floor plate within the body. 15. A magazine for a firearm comprising: a body having a bottom end, a feed end opposite the bottom, a pair of opposed side walls, a first end wall connecting the side walls with a channel in an interior surface of the first end wall, and a second end wall opposed to the first end wall and connecting the side walls, a pair of feed lips angled inwardly and upwardly from feed ends of the sidewalls, each feed lip includes a first sloped portion extending upwardly at an angle from the top of one of the side walls to a second flat portion, and a plurality of vertically extending side ridges, each side ridge positioned on an interior surface of one of the side walls;a follower including: a ridge along a first end wall thereof and configured to mate with the channel in the first end wall of the body;a plurality of vertically extending side channels in sidewalls thereof, the side channels configured to mate with the side ridges of the body;a cavity in a bottom surface thereof; anda concave arcuate feed surface extending along an uppermost surface thereof, an end point of a radius defining the arcuate feed surface being positioned above the uppermost surface and laterally offset from a vertically extending centerline of the follower; anda spring having one end received in the cavity in the follower and an opposed end at the bottom end of the body. 16. The magazine of claim 15, wherein the end point of the radius is offset from the vertical centerline of the follower by approximately 0.111 inches. 17. The magazine of claim 15, wherein each side wall of the follower includes a pair of side channels. 18. The magazine of claim 15, further comprising a vertically extending end ridge on an interior surface of the second end wall of the body, and a vertically extending end channel in a second end wall of the follower configured to receive the vertically extending end ridge as the follower moves vertically within the body. 19. The magazine of claim 15, wherein the feed lips are at an angle of approximately 17.4° with respect to the side walls. 20. The magazine of claim 15, wherein the feed lips define an opening having a height between a top of an end wall of the body and a top of the feed lips of 0.528 inches. 21. The magazine of claim 15, further comprising a floor plate positioned within the bottom end of the body and configured to engage a bottom end of the biasing member; and a locking plate engageable with the bottom end of the body to retain the floor plate within the body. 22. A magazine for a firearm comprising: a body having a bottom end, a feed end opposite the bottom, a pair of opposed side walls, a first end wall connecting the side walls with a channel on an interior surface of the first end wall, a second end wall opposed to the first end wall and connecting the side walls, a vertically extending ridge on an exterior of the second end wall, a pair of feed lips angled inwardly and upwardly from feed ends of the sidewalls, each feed lip including a first sloped portion extending upwardly at an angle from the top of one of the side walls to a second flat portion, a pair of vertically extending side ridges on an interior of each side wall, a floor plate seated within the bottom end of the body, and a locking plate engageable with the bottom end of the body;a follower including: a ridge along a first end wall thereof and configured to mate with the channel in the first end wall of the body as the follower moves within the body;a pair of opposed side walls, each side wall including a pair vertically extending side channels, the side channels configured to mate with the side ridges of the body as the follower moves within the body;a cavity in a bottom surface thereof;an end channel formed in a second end wall thereof and configured to receive the end ridge of the body as the follower moves within the body; anda concave arcuate feed surface extending along an uupermost surface thereof, an end point of a radius defining the arcuate feed surface being positioned above the uppermost surface and laterally offset from a vertically extending centerline of the follower; anda spring having one end received in the cavity in the follower and an opposed end abutting the bottom plate. 23. The magazine of claim 22, wherein the end point of the radius is offset from the vertical centerline of the follower by approximately 0.111 inches. 24. The magazine of claim 22, wherein the radius defining the arcuate feed surface is approximately 0.250 inches. 25. The magazine of claim 22, wherein the feed lips are at an angle of approximately 17.4° with respect to the side walls. 26. The magazine of claim 22, wherein the feed lips define an opening having a height between a top of an end wall of the body and a top of the feed lips of 0.528 inches.