Anyone remember Voere . They developed an electronic rifle that fired caseless ammo. Extreme accuracy. Allegedly no barrel erosion. I remember reading about in the late 80s. I also remember reading about next gen weapons trials with smart munitions. H&K led the charge with (iirc) with programmable air burst munitions in grenade launchers and heads up range finders and target acquisition through helmet mounted visor. Kinda like Attack helicopter weapons systems. Real Buck Roger's kinda stuff. It all died out, too big, too heavy, way too expensive. This was 10-15 years before 9/11 .
I wonder if any of these platforms are still in discussion.