| i've looked the several books and the closest thing i can find is a Remington deringer made in 1867 by William H. Elliot. Who designed most remington's pocket pistols. The spes say it have 5 grooves witha r/hand twist but, this gun only measures 4.8 " in length. with a 2.4 " barrel and is chambered in .410. Did the best i could. Good luck |