It's deliberately a soft case. I have a Mark 1, and was there when the first one was a prototype. Mine could be a bit bigger (the Mark 1 was intended for SBRs, the 16" guns just barely fit) but since mine is blue, nobody has a clue an AR is in there.
"And Shepherds we shall be. For thee, my Lord for thee. Power hath descended forth from thy hand, that our feet may swiftly carry out thy command. So we shall flow a river forth to thee and teeming with souls shall it ever be. In nomine Patris, et fili, et Spiritus Sancti. Amen."