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<blockquote data-quote="dwkennedy" data-source="post: 886417" data-attributes="member: 1717">5.45x39 corrosive was $100 (not long ago)steel cased 5.56x45 was running about $250I bought a LOAD of 5.45x39 Russian and a S&amp;W 5.45 AR-type rifle.The russian ammo and this rifle make a very accurate and cheap shooting combo.The rust comes from salt compounds from the corrosive primers.&nbsp; Good old soap and hot water do a good job getting things clean.&nbsp; I dry things off and clean with CLP, relube, and put away.&nbsp; I check a day later to make sure I haven&#039;t missed anything.&nbsp; After the first couple of times I got pretty good at cleaning the AR.&nbsp; Reminds me of those old tablets that turn the plaque on your teeth colors.The easiest places for rust to develop are the gas tube roll pin, and the inside of the flash suppressor.&nbsp; I haven&#039;t had any problems with the barrel/chamber (chrome lined!), the bolt carrier/bolt, or anything in the lower receiver.&nbsp; The corrosive compounds don&#039;t seem to make their way into the lower, looks like maybe they are all blown forward with the expanding gasses of the propellant, and little or nothing corrosive seems to make it back to the receiver via the gas system.</blockquote>

[QUOTE="dwkennedy, post: 886417, member: 1717"] 5.45x39 corrosive was $100 (not long ago) steel cased 5.56x45 was running about $250 I bought a LOAD of 5.45x39 Russian and a S&W 5.45 AR-type rifle. The russian ammo and this rifle make a very accurate and cheap shooting combo. The rust comes from salt compounds from the corrosive primers. Good old soap and hot water do a good job getting things clean. I dry things off and clean with CLP, relube, and put away. I check a day later to make sure I haven't missed anything. After the first couple of times I got pretty good at cleaning the AR. Reminds me of those old tablets that turn the plaque on your teeth colors. The easiest places for rust to develop are the gas tube roll pin, and the inside of the flash suppressor. I haven't had any problems with the barrel/chamber (chrome lined!), the bolt carrier/bolt, or anything in the lower receiver. The corrosive compounds don't seem to make their way into the lower, looks like maybe they are all blown forward with the expanding gasses of the propellant, and little or nothing corrosive seems to make it back to the receiver via the gas system. [/QUOTE]

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