Am shooting a Weihrauch rifle in my club's NRA smallbore prone matches and would like to mount a scope and give it a try in our 200m silhouette match. Does anyone make an adapter to go from the Anschutz-style rear sight/ring mounting slots (Weihrauch is the same as Anschutz) to a picatinny rail. A flat rail would be OK, but one with 20' of wedge would be ideal. Lots of drop in those rimfire target rounds at 200m. Thanks.