Coehorn style mortar. Golf ball size bore. The barrel is turned from solid 1018 CRS 3" diameter X 5-3/4" over all length. the bore is 1.720" X 3-3/4" deep with a 1" X 1" breach/Powder Pocket. 1/8" vent/fuse hole. The trunnion is 1" diameter X 4-1/2" wide. The barrel is painted with flat black enamel.
