When using revolvers you can get a glimpse at how good -at least to me, a higher FOV is while aiming. It also means its already in the game or at least easy to implement. Devs... please, just add a slider to the options which allows us to choose what we prefer.
Also Solokhin's iron-sights are just awful. The 90 degree angles on all sides with zero bumps, scratches or ANY imperfections give it such a fake look. A little more wear and tear would probably fix the problem...