I think one of the smith here should be able to ask this question. When I asked Keith at DW, 24 months ago to build me a Silverback in 38 super, he said it was not possible because of something in the breech. (I forget exactly his wording). He built the gun for me using a PM-38 upper. That said...
Thanks for this one. I have already put 490 rounds through it, installed a NHC one piece mag well. Very happy. Just picked up a 38super model as well yesterday. I love this DW model.
I just put one of these on my Silverback and it works perfectly. Difference it you might need to get a different rear sight depending on height.
https://www.guncrafterindustries.com/gold-bead-front-sight/