In case anyone is having difficulty tracking down King arms MP40/Sten mags, I received this from Airsoft Armoury today:
Dear Sir,
Thank you for your enquiry.
King Arms next production run of their MP40 mags is end of November, so hopefully, we should see them around 1st/2nd week in December. We have a load on reserve with them.
Please stay in touch and keep an eye on the website for updates.
Hope this info is of use to you.
Kind regards
A2
Received today from Ehobby Asia. However, they don't fit my Sten - looks like the feed hole is too small/in the wrong place.
ISTR someone posting about this, but can't find it ATM.
They probably just need a bit of whack to go in... they're a tight fit in some MP40s as well.
Harder whacking only resulted in hurting my hand. 
I opened out the hole a fraction, and now they go in when whacked - the angled part of the BB stopper isn't really long enough, requiring the whack.
At least they go in now. 
I got mine from e-hobby asia and they went in okay with a little whack, no alteration required.
I got mine from Airsoft Armoury, UK and they went in okay with a little whack, no alteration required.
Was this in a Sten, or MP40? Mine was Sten.
Both 
What's the customs charges like on ordering a box of mags' from eHobby Asia?
A Proud Member Of 'Team Spleen!' who play mainly at Gunman Airsoft, Tuddenham, Suffolk.
