I'm looking for the best type of sks for day/night operations that are not flimsy, and are good for 75 yrd. combat situations (zeroed, and stable). I've tried Williams fire sights, and even without firing the rifle I've noticed that the rear sight(apeture)with its roll pin is quite loose. It may keep elevation but it will certainly not keep windage. Ideally, an AR, M-14, or any type of peep rear sight would by my choice, does anyone out there have any ideas