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Possible, but the SP1's I've had over the years were 20". Flashhider is likely correct. It was later replaced with closed end ones that wouldn't snag on vegetation and foliage. Earliest barrels were 1:14, soon thereafter, 1:12. Good hunting, Pete
 

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Discussion Starter · #5 ·
Hi Falm16,
This is a solid stock, and triangular HG just like the M16s from Viet Nam and all the info I can find calls for it to have a 20" barrel. If a 16" barrel could have been original from Colt that's fine with me.
I'm trying to find out if it could be an original barrel before I buy it.
Thanks for the input
 
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