The AI chassis on your rifle is 7000 series aluminum. The Sawtooth rail is 6000 series aluminum. The aluminum alloy of your chassis is harder and stronger.
And it’s not that you are attaching an ARCA rail to your chassis…. It’s that you are attaching an ARCA rail to your ARCA rail. Doing so...
This is a "as new" Trijicon Tenmile 5-50x56. It's never been out of the house. I bought it for an F-Class build that got sold. The optic is in flawless condition with no marks, scratches or imperfections. I'm asking $1400 shipped.