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Originally Posted by Justice06RR
Most of my home builds are not milspec except for the barrels and BCG's. Those 2 are the most important parts of the rifle that you should not skimp on.
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Milspec calls for Chrome-lined barrels but a non-CL barrel will work just fine for a casual shooter that shoots 100rds a month and stores his AR in the safe.
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In my opinion, being mil-spec makes a barrel less desirable. First, chrome lining is inferior in every way to Melanited (nitrided) barrels, but the military still specs chrome so that's what everyone wants.
Second, almost nobody has a need for a 1:7 twist: Most people are better off with a 1:9, and if they really want to shoot long, heavy bullets a 1:8 will do the job better than a 1:7 with any bullet that will fit into the AR-15 magazine.
So I'd take a 1:8 or 1:9 nitrided barrel any day over a mil-spec 1:7 chrome-lined barrel: It will be more accurate and more durable than the mil-spec barrel if all other things are equal.