It's there ... just there ... the right side reveals a knob below the ejector which permits that shooter to adjust the height of the hold open ... a custom or experimental hold open latch.
Do like I did ... consume a 5th of Scotch while intensely staring at the photograph for several hours and it's there ... just there.
"the seller must know how to use lighting and angles to really hide any imperfections." Photoshop anyone ???
Seriously though ... It's a beautiful gun ya ??
I think it would be much nicer without all that "lipstick on a pig" white marker as Norme calls it though.