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<blockquote data-quote="ez bake" data-source="post: 1336472" data-attributes="member: 229">I&#039;ve got to be honest, I think piston-guns are cool (and am a fan of the Robinson XCR, the Sig 556, and even the FN SCAR and Bushmaster ACR), but I&#039;ve never understood the need to add a piston to any of my gas impingement guns.Lots of folks shoot steel-cased ammo out of their ARs with no issues for the most part (provided its non-corrosive, and in-spec decent ammo - there is always bad ammo out there).If its really dirty, you just have to clean the gun a little more often, but I typically shoot Wal-Mart&#039;s bulk Federal ammo and its relatively clean brass ammo for $.40/rnd.You can get decent .223 for as little as $.25-$.30/rnd and not have to deal with 5.45x39 (and isn&#039;t that ammo on the rise in price from how cheap it used to be?).That&#039;s just my opinion, but I say stick to 5.56 and good ole gas impingement.</blockquote>

[QUOTE="ez bake, post: 1336472, member: 229"] I've got to be honest, I think piston-guns are cool (and am a fan of the Robinson XCR, the Sig 556, and even the FN SCAR and Bushmaster ACR), but I've never understood the need to add a piston to any of my gas impingement guns. Lots of folks shoot steel-cased ammo out of their ARs with no issues for the most part (provided its non-corrosive, and in-spec decent ammo - there is always bad ammo out there). If its really dirty, you just have to clean the gun a little more often, but I typically shoot Wal-Mart's bulk Federal ammo and its relatively clean brass ammo for $.40/rnd. You can get decent .223 for as little as $.25-$.30/rnd and not have to deal with 5.45x39 (and isn't that ammo on the rise in price from how cheap it used to be?). That's just my opinion, but I say stick to 5.56 and good ole gas impingement. [/QUOTE]

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