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Old February 7, 2008, 12:03 PM   #2
Senior Member
Join Date: January 23, 2006
Location: KY
Posts: 1,763
The 31 is fiber optic and tritium. Also, read up on the "Bindon Aiming Concept." The 31 uses it, the 01 doesn't. That may or may not matter to you.
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