I have a 7.62x39 Russian or "Enfield K" conversion on order for an old No.4 Mk1* Enfield from them as well.
Parts to be converted were shipped to, and received by SIA in July, 2012. I haven't gotten my kit yet and no status request has been given a good response.
I'm just going to wait until the kit arrives and finish the project.
Would I do business with them again? Probably not.
Was I expecting the kit to be shipped to me within a specified period of time? No I wasn't.
Because gunsmiths and custom parts take time to build/modify/get turned around. And because no definite time frame was offered or inferred.
It's a project for the heck of it and not a needed piece of hardware.
NRA Chief Range Safety Officer, Home Firearm Safety and Basic Pistol Instructor
"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."