The new G conversion kit is a completely new and different design compared to previous Gs. So far it is only installed stock from Beretta on the M9A3s. I expect that any other Gs that may be released will also have this style. Mr Langdon has said it is a more robust design. Another advantage is it is easily converted back and forth between fs and G. Some think it is a bit clunky aesthetically, but measuring w/ a caliper and comparing to my 2014 92G, the new G is actually slightly narrower. Not remembering the exact
#s but it was something like .030 inch.