Folks are indeed pretty darned sharp around these parts! The subject of the previous Muzzle Blasts teaser is indeed a No5Mk1 Lee-Enfield Jungle Carbine. The one in my inventory as pictured is a 1944-dated BSA Shirley (M47C) specimen, imported into the U.S. during the last decade from a cache of said carbines found in Malaysia. They sold out rather quickly, by the way.
I solved the fabled "wandering zero" problem with this example by free-floating the barrel and glass-bedding the action plus first inch of the barrel into the forestock. Make no mistakes, shooting full-patch MKVII ball ammo will really remind you that you're firing a lightweight carbine, but 123-150gr handloads in the same .303 British brass are a real delight in this particular Lee-Enfield variant. This is one of the few mil-surp firearms that I have no qualms carrying into the Wisconsin whitetail woods each fall - lightweight, quick-handling, fast reloads, and decent power. What's not to like?
Now, for the next "Name That Muzzle", I give you this seriously abbreviated image, with some extra hardware thrown in for good measure: