This seems to be an issue with U.S. guns so far, not sure about the ones direct from Czech. Whatever monkey was installing the handguard had zero instruction on how to apply Loctite and so they used the adage "more is better" and it is now a huge problem on some of the guns when trying to remove the front hand guard and barrel plates :
This sucks. If you plan to remove the front hand guard for any reason and you are having issues with getting those Torx screws to budge this is most likely the reason....