Lyman 57SML. The most popular black powder receiver sight offers an immediate improvement in accuracy for the target shooter or hunter. Features 1/4 minute micrometer click adjustments for elevation and windage, quick release slide. Fits perfectly on Lyman Deerstalker, or Trade Rifle, Thompson Center Hawken and others. Other models may require drill & tap. Comes with both hunting and target disc apertures. Aperture threaded 7/32x40. This sight is rugged and dependable. Excellent for serious target shooting, hunting or those who may be experiencing trouble seeing iron sights. No. 5057SML

Match with our front sight #5017AMI