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Chrome moly - standard barrel material Chrome lined - a chrome moly barrel lined with hard chrome; prevents corrosion, eases cleaning, etc. There is no reason not to get a chrome lined barrel over a chrome moly on an AR-15..."Go Chrome or Go Home" Stainless - material used to make the most accurate AR barrels; may last not as long as chrome lined, although recent tests call that into question; more expensive; if you are making an AR as a long range/bench/accuracy gun, get stainless A 20" barrel is not more accurate than a 16" barrel. The one benefit to a 20" as far as "accuracy" is that at longer ranges, the bullet has more speed, and therefore resists wind better. However, a short barrel is more rigid, so it's kind of a tossup if you're just shooting targets. There are many, many suppliers of barrels. Where you go depends on what you want and your goals for shooting it. |
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