I have a few pieces from Recknagel and have owned more previously, they are great pieces of mounts and bases, regardless of material, steel or alu, they have proven them selfs during hunts, comps and a lot of shooting at ranges, today I have there picatinny rail for sako rifles, two pairs of 34 mm rings, that are QD with levers, and I also used to have two pairs of claw ring mounts from them to use with my drilling.
It´s an old Company, mainly targeting gun/rifle smiths and shops, they still use a papper catalog for there items and they do sell a lot in Europe./Chris