Danish royal guards
Of note, they are using the older M/95 (Diemaco C7A1) rather than the newer M/10 (Colt Canada C8 carbine, which is essentally an M4A1), presumably as the longer M16A2 looks better on parade. However note that they have slim litte red dots (Aimpoint Duty RDS?) installed rather than bulky Elcans or plain iron rear peep sights.