This Thompson Center manufactured first variation rear sight elevation spring is for the earlier Hawken muzzle loading rifle which uses the first variation rear sight and is in excellent condition having light wear. (file photo)

Note: Thompson Center Hawken muzzle loading rifles with the following serial numbers have been observed with this part:

Percussion: 73609, 111807, 130609 & 239982

Flintlock: 11555

Kit in Percussion: K145177 & K188746

Kit in Flintlock: K80324