I just picked up a new 12-42 nxs. I am suprised to see it says "made in japan" on the tube body. Is this normal? I thought our military would use a u.s. Made optics? It seem very clear and very rugged. I got the np1 rr reticle for long range pd and groundhogs. Any pointers on using this reticle? Also what height signature z rings to use on a rem 700 varmint bdl with the nightforce 20moa bases.