Along similar lines, here's my take on the Canadian C7A1 (basically an M16A3).
Started as a CMMG AR15A3, 1:7 CL gov't profile bbl. Added a Colt buttstock, Colt Canadahandguards and grip, Diemaco tri-rail, Diemaco ambi latch, diemaco ambi mag release, diemaco ambi selector, CF issue sling, Elcan C79A1 optic and Diemaco BUIS.