I've been examining a firearm of recent design & manufacture. If my observations are correct, the trigger sear and bolt stop are one and the same. I'd like the opinion of mechanical engineers or professional gunsmiths out there about this. If my observation is correct, is it wise to be combining these two functions? Is there any precedent for this? It would seem to me to be setting the trigger sear up for failure from the impact that it gets as a bolt stop from normal use. Should one have to "baby" a bolt stop/sear to protect the sear? Should this be a matter of concern for an AD?