Jul 11, 2017 · It’s simplicity, light weight, and accuracy make this rifle a viable enough option, even in today’s world where everyone demands the kitchen sink on their rifle.

May 28, 2015 · We have a little shoot-off challenge here between the original Colt SP1 rifle with a 1:12 twist and a later Colt Sporter Target Model (aka A2) with a 1:7 twist. Both rifles are fired …

Aug 14, 2014 · Retroblackrifle - Go to civilian rifles and carbines and then to Colt R6001/SP1 Carbine. There is also a serial number range guide there as well. A lot more about your …

Aug 6, 2012 · My first AR-15 was a Colt SP1 that I bought new in '71 and it had a 1/12 twist barrels, also all other SP1 that I had seen around that time had the same twist. +1 SP1 models …

Oct 4, 2016 · Barrel should be marked C MP Chrome with a 1/12 twist. Look for excessive bolt wear, especially the cam area and bolt key should be tight; not loose. Check the buffer face for …

Mar 9, 2002 · My barrel's twist rate is 1-9 but I suspect that the barrel has been changed. It is probably worth between $1,300 to $1,500. To check it take a cleaning rod, put a patch on it an …

Dec 15, 2008 · SP1 should have the same rifling twist as the M16A1 - 1:12". Standard factory .223 loads will shoot fine, except for heavy match rounds (69gr - 77gr). Current military issue …

Sep 22, 2014 · The SP-2 models were made in the 1980's after the Army went to the M-855 round hence the faster twist and bolt assist. The SP-1 "Horsey" models were the original "plain Jane" …

Jun 15, 2016 · Would someone confirm what the barrel twist was on the SP1 series AR 15 "CAR15 " style carbines circa 1978 ? Thank you. Well, I was way off, I thought 1: 10. Thats a …

Nov 14, 2024 · Whether buying a new rifle, building one yourself or selecting the right ammunition for one you already own, it is important to understand barrel rifling twist rates and how they …