AR Sponsor
Posted: 4/29/2007 4:41:59 PM EDT
looking into buying a 20" upper and have the choice between chrome moly barrel or chrome lined. what is the pros cons? may be dumb question but don't know much about barrels.
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all std (non-stainless) steel barrels are made of chrome moly ordnance steel, typically either type 4140 or type 4150 -- the latter is slightly better quality. chrome plating, or lining, is a post-machining step which simultaneously decreases surface friction and increases resistance to corrosion. these are good things. some would argue that chrome plating, due to the slightly varying thicknesses along the length of the barrel, very slightly reduces overall accuracy of the barrel. that said, i recommend that you get a chrome lined barrel. ar-jedi |
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