Answers for are 762 and 308 the same?

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Rock River Arms + Gun Parts Rock River Arms Gun Parts Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Q&A Question - are 762 and 308 the same? Rock River Arms + Gun Parts Rock River Arms Gun Parts + AR 15 Parts Rock River Arms AR15 Parts + AR15 Upper Receivers Rock River Arms AR15 Upper Receivers Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Q&A Question - are 762 and 308 the same? Rock River Arms + Gun Parts Rock River Arms Gun Parts + Rifle Parts Rock River Arms Rifle Parts + AR 15 Parts Rock River Arms AR15 Parts + AR15 Upper Receivers Rock River Arms AR15 Upper Receivers Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Q&A Question - are 762 and 308 the same? Rock River Arms + Gun Parts Rock River Arms Gun Parts + AR 15 Parts Rock River Arms AR15 Parts Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Q&A Question - are 762 and 308 the same? Rock River Arms + Gun Parts Rock River Arms Gun Parts + Rifle Parts Rock River Arms Rifle Parts + AR 15 Parts Rock River Arms AR15 Parts Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Q&A Question - are 762 and 308 the same? Rock River Arms + Gun Parts Rock River Arms Gun Parts + Rifle Parts Rock River Arms Rifle Parts Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Q&A Question - are 762 and 308 the same?

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Rock River Arms Operator ETR .308/7.62X51mm Completed Upper

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Answered by Stevey GB, Gear Expert, from TX, United States, on July 13, 2026

No, they are not the same. .308 Winchester loads are higher pressure loads than 7.62 NATO and you should be very cautious about using them in some barrels marked 7.62x51, particularly older guns. But in this case, Rock River Arms specifies that both are safe in this barrel. I have not been able to find the exact barrel markings on the 308 Operator, but rest assured, both loads are fine for use in this upper.

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Rock River Arms + Gun Parts Rock River Arms Gun Parts Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Q&A Question - are 762 and 308 the same? Rock River Arms + Gun Parts Rock River Arms Gun Parts + AR 15 Parts Rock River Arms AR15 Parts + AR15 Upper Receivers Rock River Arms AR15 Upper Receivers Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Q&A Question - are 762 and 308 the same? Rock River Arms + Gun Parts Rock River Arms Gun Parts + Rifle Parts Rock River Arms Rifle Parts + AR 15 Parts Rock River Arms AR15 Parts + AR15 Upper Receivers Rock River Arms AR15 Upper Receivers Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Q&A Question - are 762 and 308 the same? Rock River Arms + Gun Parts Rock River Arms Gun Parts + AR 15 Parts Rock River Arms AR15 Parts Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Q&A Question - are 762 and 308 the same? Rock River Arms + Gun Parts Rock River Arms Gun Parts + Rifle Parts Rock River Arms Rifle Parts + AR 15 Parts Rock River Arms AR15 Parts Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Q&A Question - are 762 and 308 the same? Rock River Arms + Gun Parts Rock River Arms Gun Parts + Rifle Parts Rock River Arms Rifle Parts Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Rock River Arms Operator ETR .308/7.62X51mm Completed Upper Q&A Question - are 762 and 308 the same?

Last updated 2026-07-10 UTC.