These are the same receivers and kits available from Federal Arms.
NO PART OF THEM IS GENUINE H&K.
The receivers are Special Weapons and the kits are mostly Special Weapons, with a few Pakistani contract parts.
The ONLY advantage to buying this stuff is you can send them to a REAL gunsmith like Jim Gravitt at Protech and have a HK94 clone gun that will actually work, and have a decent assembly and finish.
Unlike the crapshoot of buying SW5s from the factory. But it will still be a SW5 receiver and substandard parts. Plus the cost of having it correctly assebmled, combined with the cost of parts will result in a higher price than a SW5 already assembled.
The best possible senario is to lay your hands on a REAL German MP5 kit, I've seen them on subguns occassionally for about $850.00, and have Jim build them onto the SW receiver. But for the price and trouble you could almost get a preban HK94.