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10/20/2017 1:01:18 AM
9/22/2017 12:11:25 AM
Posted: 8/12/2001 12:15:01 PM EDT
What is the twist on these old Colt SP1 AR-15's? I know I could do the cleaning rod and ruler thing, but figured one of you AR15 gurus would know right off the top of your head.....
Link Posted: 8/12/2001 12:18:39 PM EDT
Hay Bill I think it is 1in12.
Link Posted: 8/12/2001 12:26:23 PM EDT
Link Posted: 8/12/2001 12:54:52 PM EDT
Same barrel as the M16A1, 1:12 chrome lined. Skinny compared to HBAR. If all you shoot is 55gr. bullets, this is an excellent barrel.
Link Posted: 8/12/2001 10:52:05 PM EDT
My SP1 ser 898XX was 1/12, a standard M16A1 bbl, chrome bore etc.
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