The barrel shroud I think you mean is standard with the MPR. I don't have anything non standard at that end.
Missed 7 which won, but all the good shots at the Masters today.
EV2 Mk3+Sightron SIII 10-50 x 60 LRIRMOA / Bushnell 8-32
Theoben Rapid 12 FAC
GROWING OLD IS NOT FOR SISSIES