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The Range
Rifle & Shotgun Discussion
Polymer ARs
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<blockquote data-quote="rc508pir" data-source="post: 3086945" data-attributes="member: 40091"><p>What you really have to watch for on polymer lowers is the metal insert for the buffer tube. Many of them are made of zinc which is very soft and not made for abuse. Not a problem for most shooters, but, for instance, if you shoot steel cased ammo and get a case stuck. You cant mortar (slam it on its butt) to try to get the case unstuck. ATI used to use zinc but I dont know if they still are or not</p></blockquote><p></p>
[QUOTE="rc508pir, post: 3086945, member: 40091"] What you really have to watch for on polymer lowers is the metal insert for the buffer tube. Many of them are made of zinc which is very soft and not made for abuse. Not a problem for most shooters, but, for instance, if you shoot steel cased ammo and get a case stuck. You cant mortar (slam it on its butt) to try to get the case unstuck. ATI used to use zinc but I dont know if they still are or not [/QUOTE]
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