Magazine Capacity Increase

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I took apart some 5 round 450b mags last night and cut the spring to leave one full coil at the bottom and they will hold 7 rounds. It was necessary to stretch the spring some to extend 2 1/2″ – 3″ above the mag body before installing the bottom plate to provide sufficient pressure to lock the bolt open after the last round; however, loading and feeding felt better after replacing the spring with a standard 20 round magazine spring.

I also discovered that 20 round BMI 5.56 mags with the grey no-tilt follower will hold 7 rounds and feed fine in my rifle without the single shot follower.

Author: admin on October 22, 2009
Category: Uncategorized
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