Originally Posted by
TooBigToFit
HK had also done the HK94, which was a 16" barrel semi auto MP5.
There's a decent chance the MP5SD in question is a "Todd Bailey" clone. Todd Bailey was a guy who would start a company selling HK clones, sell a bunch of guns of varying quality, then disappear when people got too pissed off. He would then start a new company, do the same thing, rinse, and repeat. The most well known company he started was Special Weapons, but others include Coharie Arms and Bobcat Weapons (though it seems he may have only supplied parts for the latter). You might get a good gun (less likely with the Special Weapons guns as far as I understand), or you might not. It could also be a quality clone built by a quality builder. Can't know for sure unless you see the markings.
I personally have a Todd Bailey gun, a Coharie CA89 that I SBR'd. Functionally, the only issue I had was that I needed to replace my ejector lever and spring for reliable function. Runs fantastically now. The only other issues I had were that the claw mount tabs seem out of spec (can't mount a QD style claw mount, but most other mounts work fine), and the 3 lug interface was out of spec (got my suppressor to fit after a bit of filing to the lugs).
To me, there's not much appeal to a SD clone, unless you can't find 147gr easily. It's gonna be a pain to keep clean otherwise, and you lose ballistic effectiveness.
There is one advantage to the gun in the OP though... It has an ambi lower and pack. Ambi packs are not nearly as common as SEF packs, nor are they interchangeable. It's one of the main reasons why I went for my Coharie Arms gun, even knowing the issues they ran into. In addition, a lot of US clones have a lot (if not all) US parts, so 922r becomes a lot easier. At $2K though, I'd have second thoughts.