Ive got a few questions for the pe90 guys. Is the rear sight welded on? How solid does the b&t rail mount up? Trying to decide which to buy. Either the flat top special target or a classic green. I like the irons on the non flat top models and the versatility of being able to take off the scope and shoot irons is nice in a $3500 gun. My only concern is I can be a little rough on things and if I bump the scope I don't want the rail to shift on me. And for my last question, are there any back up iron sights I could mount on the flat top rail model to achieve virtually the same versatility of the classic green with a b&t rail and scope without having to worry about losing zero if I drop it due to the rail shifting. Maybe I'm over thinking this and b&t rail is probably nothing to worry about. Looking for some advice from people who have experience with the pe90