Well, that's true, it is a job title, like machine-gunner, driver or sniper. But it's also more than that...it's a term used by Rifle Regiments to designate their Privates. In a similar manner, Armoured Regiments tend to use Trooper, Artillery uses Gunner, Guards Regiments sometimes use Guardsman, Highland Regiments sometimes use Highlander, Engineers use Sapper. There may be a few more I'm forgetting. However, these are not ranks, nor are they appointments, like MCpl. They are terms used by these organizations to support tradition and to help foster a deeper sense of cohesion among their soldiers.