I was rebarreling a rifle for a client yesterday and found a "N" stamp behind the safety catch spring on the butt socket. I can't remember seeing a Naval ownership mark on an Australianicon rifle. Are they uncommon? It's a bog standard '42 Lithgow and matching throughout except the barrel which I changed yesterday since the original is shot out. The barrel supplied is a nos Indan RFI. It was stripped of the sight bases so I fitted excellent Australian spares I had here and installed the original matching rear sight. I ranged tested it at 25 yards yesterday afternoon and it's perfect. Managed two through the same hole and dropped the third which is normal for my blind arse so can't blame the rifle. The rifle appears to have seen service in the tropics. Lots of handling marks in the otherwise sound but worn coachwood and finish worn original metal. Green paint on the underlying metal. It doesn't sport any district markings on the breech ring or any Britishicon ownership marks. Did Australia have Naval Infantry or Marine type units?