I'm a believer in chrome lined barrels for ARs if you're going to shoot much. Furniture is changeable; barrels, not so easily.
I have a Bushmaster with a chrome lined barrel that has thousands of rounds through it...no problems at all.
By the way, I'm not a fan of steel cased ammo. Steel on steel in my bolts and chambers is a no-no. Just my opinion...shoot what you want, just practice!.
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Loving retirement!
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