I've picked up a frankenkrag carbine that resembles a NRA carbine but I dont think it is the real deal. Its got a good bore and blueing and the stock is original finish but has a few issues. The cut down stock is cartouched 1901 and the recvr is 1898. My question is how can I adj my windage as it is shooting left and my rear sight only has elevation. My only thought would be to shim the side of the rear sight. I've successfully done that on a 1973 tang sight. My photos are not downloading so I need to take some others. I will take new ones this week to post.