Out of stock Quick view Ruger 10/22, 77 Mark II Magnum Takedown Screw MidwayUSA MSRP: $5.95 Now: Now $4.00 Was: Ruger 10/22, 77 Mark II Magnum All Models Takedown Screw Hex head as an optional better choice for the factory screw. 823387-052716 MSRP: $5.95 Now: Now $4.00 Was: Out of stock Quick view