At the moment the Australian british and New Zealand SAS are using the M4 Carbine as their main assault rifle. But with the introduction of the FN Scar into the U.S special forces will the SAS regiments around the world trade in the M4 for the FN Scar. Also will the Commando's use the FN Scar as well ?
Do you know about SF acquisition of equipment? I imagine it runs a bit differently to the normal tender process the rest of the ADF goes through.
If the SCAR's capabilities far outweighed the capabilities of the M4 then I think they'd look into it...
I doubt you'll get an answer from here - remember, the fact our SF began wearing multicam was not a widely know fact until after it had started happening