The Snider-Enfield Snider-Enfield Mk III is a united kingdom-made breech-loading rifle chambered in .577 Snider, introduced in 1866. Primary use: collector. Type: Rifle Action: Breech-Loading Caliber: .577 Snider Capacity: 1 Year introduced: 1866, United Kingdom Weight: 104 oz Overall length: 43.5" Status: Discontinued Military use: Yes Intended use: collector