This Thompson Center manufactured blue finished rear sight base screw is for the Thunder Hawk in-line muzzle loader with the folding leaf all metal constructed rear sight and is in very good condition with light slot wear. (file photo)

Note: Thompson Center Thunder Hawk muzzle loading carbines and rifles with the following serial numbers have been observed with this part:

Blue Finished Thunder Hawk: 5456, 21098, 23257 & 30115

Blue Finished Thunder Hawk Shadow:

Stainless Steel Firearms: S1153, S2675 S3635 & S25958

Stainless Steel Thunder Hawk Shadow: