April 2020, the U.S. Army picked L3Harris and Vortex Optics to compete for the NGSW fire control system with spec to rapidly engage man-sized targets out to 600 m or greater range with an advanced optic that contains a laser range finder, a ballistic calculator and provides the shooter with an automatic, adjusted aimpoint on new picatinny 'smart' rail, the T-Worx Intelligent Rail platform, which connects to the battlefield network and integrate real-time video/data and other analytics for transmission back to the command centre.
NGSW-FCS planned procurement 250,000 units, production scheduled to begin late 2021 with a budget of $819 million over the next five years, $3,260 per unit.
1)L3HARRIS recently announced delivery of 115 production prototype systems of its fire control units, "an integrated approach to augmented aiming by combining range-finding capability, ballistic computation and environmental sensors that increase the accuracy while decreasing the time to engage a threat" Leupold & Stevens provides the optics
2)Vortex with its 1-8x 30 objective with an active reticule fire control unit, claiming 1,000 m-capable laser rangefinder, state of the art on-board ballistic engine, atmospheric sensor suite, and programmable active matrix micro-display.
Note. The drawback of laser is that can also be seen clearly on infrared cameras/optics, which will easily give away the spotter's position.
If you were to base spec on Wehrmacht experience fighting the Russians on the eastern front, the StG 44 with the intermediate power 8mm Kurz round ~300m range was near perfect rifle, so why is the US Army now specifying a new full power 6.8 x 51 round for their troops, 6.8 is the opposite extreme from the light intermediate 5.56 round which was if anything not as powerful as needed, originally 5.56/223 US grabbed first thing to hand to counter the AK47s (Russians also supplied Viet Cong with captured StG 44s) in Vietnam, subsequently US loaded 5.56 hotter, higher pressure and with heavier bullets. Now US with the new 6.8 >600m range the resultant rifle and sights will be heavier and more expensive, ammo will be heavier and troops able to carry fewer rounds for fire fight than the 5.56. Would not be surprised if the US will keep M4 5.56 for the majority of their troops, with 6.8 replacing the 7.62, so still left with two rounds.
Why the British post WW II plan was to choose a single 'ideal' intermediate cartridge, the 280/7x43 slightly more powerful than the than the 8mm Kurz.