The original scope on the M1903A4 was the Weaver 330. Later versions used the M81 and M82 scopes which from what I've read were copies of the Lyman Alaskan model civilian scope. If you're talking about the Marine sniper on the M1903A1, it would be a Unertl target scope. I think it was either 8 or 10 power. This is all off the top of my head, you can probably google it to get a more in-depth answer. Hope this helps.
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