It really doesn't make sense to rework the SCAR's trigger design, as WE themselves have re-used the same basic design with minor changes on 4 guns (M4, SCAR, PDW and G36). Changing the design means retooling, redesigning and recasting, which costs a lot of money - heck, if they didn't change the trigger group for a relatively drastically different gun (G36) why would they change it for an old one? My money is on just the hop, outer barrel and bolt, just like the PDW.