Quote:
Originally Posted by oneyeopn
the new colt requires an adaptor to allow you to use a 5.56 upper with it, I am afraid we would get back to the stacking tolerances and no one has said what the front pin diameter is on the new Colt.
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Nice thing about Colt's LE901 is that the adapter makes it accept any mil-spec .223/5.56 upper though, meaning it would also accept the .300 blk/whisper. Stacking tolerances could become an issue, but none of the reviews I've read point to any problems.