Well, I would disagree with the person who's advised you not too. After all, although not full length, the TX and PS seem just fine, fair enough there not 'carbon'. Plus, the amount of tuning going on at the moment, bits like the little 99, shrouds are super and almost the next phase in tuning process after internals. There a matter of taste of course, but if you would like one, get one installed. It won't do anything, but make the rifle look better. But again, that's an opinion. Unless your actually considering chopping the barrel down and having a proper shroud sorted.
Whoever advised mayb