New to the forums, and searched previous posts but couldn't find the answer. I have a Benelli M2 field model 20ga 26" barrel. I also have the leupold deltapoint pro red dot. The receiver doesnt come drilled and tapped so whatever the work is, I will likely farm out to a gunsmith. Anyone marry up the M2 and the deltapoint pro? What system did you use to mount it to the gun? Also, can you co-witness the barrel beads (incase the battery dies or the sun is in the background)?