The Single Action Army became available in standard barrel lengths of 4¾", 5½" as well as the Cavalry standard, original 7½". The shorter barreled revolvers are sometimes called the "Civilian" or "Gunfighter" model (4¾") and the Artillery Model (5½"). There was also a variant with a sub 4" barrel, without an ejector rod unofficially referred to as the "Sheriff's Model", "Banker's Special", or "Storekeeper"
This model has the 5.5 inch barrel