Instead of a hidden clip that is behind a glued in cap on the front of the mantlet, they now have a sectioned mantlet that retains the barrel from behind.
A simple step by step screw removal and the barrel slides out of the mantlet.
A lot easier to do recoil mods and suchlike.
I am doing recoil on an old first gen Torro with a damnation metal turret and aint that a B$$#h


Destroyed the Torro mantlet in the name of science and now grafting a H/L V7 KT assembly into it.