I have forgotten all the reasons,but I know it is not as simple as it might seem to bob a full 1911 into a commander.There are other differences.I think they will still be trouble going in reverse.
Really,the most practical ,economical way to go is trade.A nice Colt Commander won't have any trouble finding a trade for a 5" 1911 .Both are desirable,and the 5" is more common.
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