Well, I've repaired three 1911s that jammed because they disintegrated from use, two were WCs and one was a motor-oil colored generic. Personally, I don't use them as they take up space that keeps your recoil spring from moving the slide back that much. In a properly sprung and operating 1911 the frame and slide never meet anyway so, I have no idea what they're protecting from battering.
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Diligentia, Vis, Celeritas
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NRA,GCA,OGCA, USAF,Msgt.(Ret.)
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