I have a 30-30 with iron sights, it is a nice rifle for hogs in south Texas but I have a problem with the sights.

Last year someone dropped the rifle somewhere in the ranch and now I just can´t get it to shoot right. It places the shots in a pretty decent group but 20 INCHES TO THE RIGHT AT 100 YARDS!!!!

Since the sights don´t have any horizontal alignment I´m thinking of getting a new set with MOA adjustment.

Can you recommend any brand/model sights?

Any comments will be appreciated.