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Posted: 7/17/2001 7:31:02 AM EDT
Does only colt have these blocks in their lower receivers?
Link Posted: 7/17/2001 7:34:04 AM EDT
Link Posted: 7/17/2001 1:37:53 PM EDT
Not all AR lowers have a blocked area... Only my latest Colt blue label does ( a pinned in type). My other blue labels don't and neither do my SP1's... DIAS units fit right in with no modification. I believe BM receivers were fully milled out also (until recently).
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