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1/25/2018 7:38:29 AM
Posted: 8/20/2002 5:38:03 PM EST
I have been told to stay away from the SP1, as it is a large hole on the lower reciever. I have seen several different adaptors to mesh the large hole with the smaller holed current uppers.

Why would this be a bad thing to do? What am I missing?
Link Posted: 8/25/2002 6:24:38 PM EST
Have A-1 upper w/lg hole; looking to buy Colt Sp-1 or A-1 lower complete, stripped or anywhere in between. Anyone?
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