We stock the 12 round 6mm BR mags, £79.94 delivered. Much cheaper than buying direct from MDT (if you factor their EU pricing + shipping + parcelforce import duties).
https://riflemags.co.uk/mdt-6mm-br-12-round-aics-magazine/
They are the same length as a 10 round Accurate Mag, a shorter version is on the MDT todo list radar but nothing anytime soon.
We'll be stocking a similar kit in Q2 next year for use with standard 5 round mags.
😎