.50 caliber. 21.5" barrel. SN: 11725. Blued and color casehardened finish, walnut stock. Single shot breechloading tilt-down barrel percussion ignition cavalry carbine. Standard Mass Arms Co and Poultney & Trimble markings on receiver. Matching serial numbers on frame and barrel. No cartouches present on the stock wrist. Retains original ladder rear sight, front sight blade replaced with a taller modern one for shooting. Sing bar and ring intact. Although this serial number does not appear in the four volumes of Springfield Research Service serial number books a number of guns very close to it do, all issued to Company L of the 1st Alabama Cavalry (US), including #11730 and #11731.