Seriously, while peep sights are best used as close as possible to the eye, and the tang peep sight the closest of all, it's not a good idea on a long gun that has a lot of comeback, as it makes the possibility of eye damage a reality.
--But, but, but Quigley...
Yeah, I know, just a movie...but how do those
tang sights on 50-90s and whatnot not smack you in the eye? (honest question, I'm building a 50 Alaskan bolt action
) I recall the one in the movie was removed when not used, but surely (surely) they've developed a way to lock the things open when deployed???