Since I'm going to install Savvy armor, I'd like to keep the look consistent with countersunk stainless steel Philips- head bolts. I'd want to drill out all the rivets, drill countersunk holes, then replace the rivets with 5/16-18 Phillips-head bolts. It's hard to tell from the picture, so from your perspective is there enough room to do countersunk holes? Obviously doing this in a way that maintains strength also depends on the material thickness. 1/8" isn't very thick, so I don't know if this would work. Maybe
@mrblaine can chime in on the idea?