T/C Thompson Center Grey Hawk SS Under Rib W/ Screw. Part is from a Thompson Center Arms Grey Hawk cap lock .50 caliber black powder muzzleloading rifle. Guaranteed to be genuine and original. Rib is in excellent condition. One screw is included. Photos are of the actual item you will receive. Please, examine the photos and if you have any questions about the listing or need additional photos, contact us. Seller assumes no liabilities. Know your local laws and use a licensed gunsmith. (D)