Thanks for all the input - I am intrigued. I didnt get a good look but might have an opportunity in a couple of weeks time in which case I will try and get info on marks etc.

With its condition and a 14x scope I couldnt see it being a genuine service weapon.

I cant see a service scope being engraved/stamped SNIPER USMC but on the other hand cant see a competent faker doing so either

I know nothing of US service target competitions but I it might fit with being a USMC sniper team target weapon (standard service issue rifle fitted with target scope?) - perhaps some of you doughboys could help a limey out

John