As for adapter - you just get a tube/sleeve aprox 20/25mm long
ID 6.2mm x OD 9mm aprox type of thing......
You might track something down on the imperial side of things.....
Or
Now being that an old alloy/steel/brass aeg barrel is say 6.08mm x 8.5mm aprox....
Bit of aluminium heat tape wrapped around the outside and a bit of filing inside
(the .209 primer only goes in about 8mm into tube/sleeve/diy adapter anyway)
Just something you might look into if you get stuck on adapter or avoiding the cost
I bought my timed BFG from zero one - jeez had to fill in form and scan/email it back
(kid you not, they had my ukara but still had to fill in a form and scan/send it back)
Ordered adapters - but they were for the OLD BFG's not the NEWER models
(this was about 4 years btw - and they were great at taking the old ones back for full refund)
Unfortunately they were out of stock of NEW adapters so I had to improvise
Others have done similar stuff, it comes as 9mm by default, but the .209's are like 6p or so
instead of say 30p for 9mm blanks - tbh there is not a massive " BANG " difference imho
That said if people can't improvise then adapter is available in many places....
http://www.actionhobbies.co.uk/Dynatex-Grenade-Cartridge-Adapter-For-209-Primer_A1QMHD.aspx?nh=3589120#.Wt4prS7wbIV
http://www.zerooneairsoft.com/product_info.php?cPath=266_414&products_id=3328
DO NOT BUY THE OLD STUFF....
(like I did and had to return...)
http://www.zerooneairsoft.com/product_info.php?cPath=266_414&products_id=6339
&
http://www.zerooneairsoft.com/product_info.php?cPath=266_414&products_id=5364
Just buy the damn thing, a small box of 9mm to get you going for the moment
.209's are great - but f*ck me are they ultra tiny to f*ck about with in the game with gloves on
And even 30p Vs say 6p it is still a big saving over pyro's
(I'm going with a rough ballpark figure - you can get these cheaper in bulk I know)
BUT then you can't use BFG's at Mall so it is horses for courses and all that crap
You can get yourself going with say 9mm then sort out a 209 adapter or DIY etc....
Agree with
@proffrink - I don't know which I'm more shocked about tbh....
people's Google-Fu or lack of ingenuity/work around/bodge (whatever you wish to call it)
Still think that covers most stuff in the end