Simple suggestion, just add under-barrel launchers to the Nanite Systems Assault Rifle and Carbine. I don't think it would be overpowered. What do you guys think?
I really think the UBGLs and UBSLs have to be made more useful first. 1) Make UBSL smoke jam locking missiles and block Q spotting. 2) Make UBSL smoke blind people who have adjusted their game settings to try and neutralize smoke effects. 3) Give each UBGL grenade launched/resupplied a nanite cost. Current Frag Grenades cost 50 nanites a pop, so 50 for each UBGL Grenade seems reasonable. 4) Buff UBGL Grenades to slightly less than Frag Grenade levels. 5) Remove ability to resupply UBGL Grenades from Engineer ammunition packs. Now you have UBSLs that actually work, and UBGLs that become highly effective but situational and limited weapons. Then you can put them on NS stuff.