I actually worked on a weapon with linkless feed (specifically, the M230 Chain Gun, as mounted on the AH-64) when I was in the US Army. Without links, the weapon relies upon a conveyer belt to transfer rounds from the ammo drum to the gun; this conveyer belt requires a motor to run it, and the motor requires electrical power to run.
I'm not certain an infantry weapon merits the use of linkless feed- the tradeoffs don't seem worthwhile.
I think it more of a Browning M2, and the DShk machine gun. But I also see elements of the LSAT, and the FN Mag. Watch me if you want for gun designs!! Where are you from? Scotland? Wales? England? North Ireland?