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9/19/2017 7:27:10 PM
Posted: 3/26/2006 6:16:48 PM EDT
I built an A1 with a 24 inch bull barrel in 1990. I don't have a clue what the twist rate is.(Sucks to get old) I pulled the barrel and no marks other then 5.56 near FSB. Is there anyway to tell the twist rate with simple tools?
Link Posted: 3/26/2006 6:33:22 PM EDT
You can try taking a cleaning rod with a tight patch and push it through. Mark the rod so you can tell when it makes 1 complete turn, then measure how far in it was. Should put you pretty close. YMMV
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