I think if you look in Gunmart, some of the airsoft companies specialise in getting gear as used by special forces........
I have seen blackhawk advertised and I believe they have a good reputation as a special forces supplier but I could be wrong.
There are a few airsoft specialist around - Wolf rings a bell.
either that or contact them and ask them for a list of UK suppliers or import it
In a battle of wits I refuse to engage with an unarmed person.
To one shot one kill, you need to seek the S. Kill only comes from Skill