The Cimarron 1866 Yellowboy reproduces the Winchester Model 1866, the first successful Winchester lever-action and the immediate predecessor to the 1873. The brass receiver gives the gun its Yellowboy nickname. The .44-40 Win chambering is the most historically relevant for this model. Type: Lever-Action Rifle Action: Lever-Action Caliber: .44-40 Win Capacity: 12 Year introduced: 1990, Italy/USA Weight: 8.3 oz Overall length: 38.5" Status: Active Intended use: Cowboy Action, Western