I think you can find German ones for cheaper than 400.
I have the Tapco and I use it with a light/scope for night hunting hogs. It always re-zeros and has worked well for me. Fit my JLD/PTR just fine/solid.
I figured "hey, if I`m gonna have a clone why not go all the way".
Look for the HK mounts before you get a Tapco. Deals are out there. When I bought mine the price difference was more than it is now I believe.