I just bought an ebr chassis and I'm about to get the sage cantilever mount. If I zero using that mount can I take the chassis off of the rifle to clean it and re-assemble it and it stayed zeroed or am I going to have to re zero every time I clean it. I wouldnt detach it from the top rail I just mean if I take the receiver off the chassis with the cantilever mount connected to the receiver and the top rail

You might need to go to another forum to get your answer. There is a wealth of knowledge on the M1A platform there.

http://m14forum.com/forums.php