Andreas, I agree, and my Sauer does have the set trigger feature for use with the rifle barrel. But if the shooter puts a .22rf insert barrel inside the right shotgun barrel, and then wants to shoot that barrel accurately, he will not have a rear sight to aim with, because with most drillings the rear sight will not pop up unless the rifle barrel selector has been pushed. It would make more sense to me if the left shotgun barrel held the insert, because then the right barrel could be used as a shotgun with the normal front trigger pull, the rear trigger could be used with the left barrel if the rifle barrel selector was pushed to activate the pop-up rear sight, and of course the rifle could be used with the front trigger, either set or unset, when the selector is slid forward. Does that make any sense? So please explain why I see drillings with an insert barrel on the right. It does not seem logical to me.