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M4 magazine spring and reliable cycling


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I am experimenting with a Nordic Components +1 magazine extension on a CC 7 rnd mag tube. First test was with the standard CC/Wolff mag spring which came with the CC magazine tube. Had some failures to eject with this setup when using Federal 2 3/4 reduced recoil 00 buck. Full power Remington Express loads cycled OK. The Nordic extension came with a very long spring which must be cut to proper length. I will try that next, but am wondering how much effect the mag spring might have on proper cycling?

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failures to eject with reduced recoil 00 buck. how much effect the mag spring have on proper cycling?


The mag spring has a lot to do with cycling on an M4. But it has no bearing on ejection. I think the low recoil shells are the suspect.

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