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What is the proper "break-in" procedure for a chrome lined AR barrel?

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Question

What is the proper "break-in" procedure for a chrome lined AR barrel?

Answer

After firing a couple hundred rounds, the chrome lining will "polish out" from its light, flat gray, factory-new look to a brightly reflective, polished appearance. During this break-in period, excessive cleaning with solvent or brush should be avoided as that will only prolong the time (and number of rounds) it takes to achieve the final "bullet polishing" of the barrel.

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