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A contractor that we use to talk to in Iraq had a AR based PDW chambered for .45 acp it had a 9.5in barrel no but stock and a forward grip on a shorted rail it was on a ZM upper with no buffer tube it looked cool he sed he liked it . he never let us fire it tho. do not know how reliable of a bolt it could have tho to fit a .45acp in a ar bolt you would have very little room left on the bolt. on mags he sed it used .45 cal UZI mags
