Any 9X39 shooters?

[Maharlika75]

Seen a few threads on it on TOS and the usual sites.

Would love to do one, but haven't seen anything for mags besides some lip adjustments on Lancer mags. Anybody here using 9x39?

Thinking I'll do this or 375 raptor for a hard-hitting subsonic SBR.

The lowered mag capacity of 458 SOCOM is a turn-off for me.

[anubismp]

Its been a while since I've looked but I've always had an interest in these cartridges.