This is a very tough piece to find! It is an original wooden tompion for a .50 caliber carbine. This would mean that it would fit the Civil War Maynard carbine or also could fit the Palmer Carbine. In the gun tool book they have one that is similar to this one on page 288. This one is in excellent non-excavated condition and is one of the pieces that came from the massive collection of Civil War surplus form the Bannerman Company of New York. They acquired literally tons of military items from the U.S. Government after the Civil War and sold the pieces for almost 100 years. Don't miss this rare jewel.