I have 2 M2's one in 20ga. Realtree APG and one in 12ga Max4. I really like both guns. Light to carry and reliable! I'm actually using my 20ga. turkey hunting this spring.
my M2 20 gauge with a 26" barrel came with a middle bead but the M2 12 gauge with a 26" barrel that I just bought today didn't. Also the two guns have 2 different rib widths.