I have been carrying the VP9 since it came out and USPs before that. There are two very good options for having sights installed on H&K pistols that I have personally used.
First, have the H&K factory armorers do it. Call the factory service department for an RMA number and send your gun and sights in. Aftermarket sights are fine with H&K. If you ask they will zero them on their factory range with their ammo.
Second, Lazy Wolf Custom Guns has zeroed my 10-8 sights on my VP9s with my carry load while they have the gun in for custom work.
Hope this helps.
Tony
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