from R.E. Davis. This trigger is styled after an original P.I. Spence trigger and was commonly used on percussion target guns from the mid 1800's through today. Rear trigger must be set before firing and can be adjusted for a light crisp pull. 5-3/16" long, 3/86" wide, 13/32" high from bottom of plate to top of trigger when cocked. Well finished, properly hardened and dependable. No. 53ST7