Numrich Gun Parts Remington 510, 511, 512 Open Sight Leaf &ndash; Screw Type Aftermarket Screw type Remington 550-2G, 550-1A, 550-1, 552, 572, 552GS, 121, 514 Remington 510, 511, 512 2.66L x 0.56W x 0.05H