To me its cool to have a kit that matches since I dont have the funds to purchase a registered one. Price wise they usually go for quite a bit more, but im more interested in the historic aspect that all those parts once made a MP40 that was used in that configuration. Just my 2 cents maybe it does not matter to most. Maybe one day ill stumble upon one (maybe in this forum) that is matching that I can afford, but until then parts kits is how I enjoy the MP40.