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Is the barrel chrome lined? — 3 Answers

by Robert, from WV, United States Asked on November 24, 2022

Name Ballistic Advantage OPMOD Modern Series 5.56 AR-15 Government Profile Barrel (4.3)
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Answered by Ethan, Gear Expert, from IL, United States, on November 28, 2022

Yes, the Ballistic Advantage OPMOD Modern Series 5.56 AR-15 Government Profile Barrel is machined from 4150 Chrome Moly Vanadium Steel and features a Chrome-Lined Bore and Chamber.

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Answered by TonyF, guest, from WY, United States, on July 29, 2023

Modern series is qpq nitride. Classic series is chrome lined bore and chamber with a manganese phosphate outer finish.

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Answered by Thomas B, member, from CA, United States, on October 14, 2025

No, modern series is not chrome lined. As far as I know only their classic series is chrome lined (w/ phosphate outer). This one is just QPQ

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