Skd m4 mag conversion 😁

As I had it on the old forum, I thought I would put the link back up here for those who may be interested :blush:


That’s cool! Do you happen to know what the optimal barrel length is for that gearbox?

Thank you so much for that write up! Mark that down for a future project

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Would have to calculate it again :thinking:
I went just long enough to run a hop-up on the original :sweat_smile: