Yeah I can't recall why but Cobra Company at the time weren't an option for me when it came to getting M134's for my 1/48 UH-1C/B gunship (this was 2013 (or possibly even 2012)) and thus Ray offered to send me the parts.
Also from what I can tell that set doesn't include the correct M21 weapons system mounts, the ESCI UH-1D kit does/did.
Think the problem at the time was CC not being able to take Paypal payments, and as I live in the UK, and I don't have a credit card, it looked impossible for me to order from CC. Turns out they take Western Money Union payments though, but at the time I wasn't aware of that, and I've not yet tried as I'm yet to order from CC...
UH-1 of any sort in my opinion are under-represented at the moment across the market in any scale bigger than 1/72, in terms of availability of full kits and aftermarket parts.
Although having said that Italeri recently re-released their 1/48 UH-1D kit, not sure of the weaponry on that though, if it even has any. I've considered buying that as well as their UH-1N (when I can cobble the money together to do so) as I fudged several parts of the ESCI kit Ray sent me and think I could do it much better again (primarily because I'd build it as a static kit, not as I intended previously with moving parts and a fuselage that splits apart for maintenance of said moving parts).
I'd love to get my hands on a 1/35 UH-1D/N but Dragon don't sell them any more and eBay sales of them seem to have dried up or gone to what I consider silly prices for the kit (or just prices I can't/won't stretch to).
I had trouble sourcing a 1/35 Academy UH-1 (B or C, I forget which it is?) Frog gunship kit, ended up finding one on an obscure French model shop website and probably paid a little over the odds for it.