It has lately been clearly more common to see SEALs running an M79 within a team instead of 203s. More versatile, the ability to switch among the crew and the fact that it doesn't weigh down the primary are reasons for this.
Its your rifle, whatever. I too have armoury numbers on various parts on my ST3 CQB-R, so as a concept I like it myself as well.
IMO the numbers being that huge just look awkward, no matter how many reference pics you find.