I have been doing a bit more research and from other markings I have found this,

Two Broadarrows with the letters VIC in between. It would seem that this rifle was originally used in Australia.

VIC Victoria Second largest colony in Australia, the broad arrow was not as widely used here as elsewhere. Other letters and marks may appear above or below the VIC mark.

The Broad Arrow is the oldest and most common mark of British government ownership. Arrows may be alone, above or between letters. There are many variations of broad arrow.

Can anyone assist further?