Can’t comment on MP9 to PMX compatibility, but MPX mags DON’T work in MP9’s. The feed lips are maybe 1mm lower in the MPX, so just shred the BB’s on the feed ramp when feeding into an MP9. Works fine if you fit an MP9 feed lip to an MPX mag though.
Well I was mentally screaming lol. Did you check to see if is safe to instal for left handers like me? Cheers! P.S. Humidity decreases gas expansion and any dampness can affect the lubrication too. Funny thing, I lived in Florida where the humidity is horrible at 96% later (after a couple of other countries) moved to Wales and the Humidity is exactly the bloody same 96%!
I have a mental block when it comes to KWA GBBRs, the HK416 had issues, mags etc. There are not enough parts support/upgrades on my radar, FPS mgt NPAS is not straightforward, IMO, and I could be completely wrong!
My MP9 mags work fine, even lock back, but I did disengage the spring on the bolt stop. Have no problems with it while playing, just can’t shoot upside down. Somehow the spring seems a bit too firm or something. Edit: my vorsk mags also work fine, but seem to shoot way hotter than the mp9 mags, do you know why?
