I like to use it on the SAS-R/Ghost personnaly, it's a GREAT advantage. red^ what I would of said if someone hadn't said it
I've fitted the straigh pull bolt to my Longshot and SAS-R. As others have said, there is no downside to fitting it as there is nothing else for that slot. If I'm out in the open then I will "generally" always scope out between shots. Only if I am absolutely sure there are no enemy snipers in the area will I bother with a follow-up shot, having missed the head. I move off straight away and cloak and then consider whether or not to either move even further away or even redeploy altogether (I'm a chicken, hopeless at CQ and hate dying). The headshot, for me, is key and a body shot is a fail. SPB is great for sniping from within a spawn room though