I really want the pistol mounted RDS to work at the level of reliability/capability needed and I am always interested in the new developments with same but I don't see (yet) how they're going to equal the carbine mounted set-ups until they can somehow decouple the sight from movement of the slide without a lot of bulk added. Shock absorption may enable it to last longer but I'm not sure that will be the final answer...it'll be interesting to see how the evolution goes.