Hello, I am new, so bear with me please!!!

I inherited, from my Dad, a WWII, Korea, and Vietnam Vet...yes 3 wars..pretty proud of that.. a rifle, presumably a sniper weapon. This rifle is marked Remington 03A3 and has an M82 scope with Redfield mounts. The serial number is Z4000946. From what my brother has told me, this was "procured" by dear old Dad, during either WWII or Korea. It is in dandy shape, and I was just wondering about the history of this weapon, and if it may be worth anything. Any info anyone may have would be greatly appreciated. Thanks and Happy Holidays to all!!!
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