I have replaced the MSH on 4 of my SIG pistols
one is XO and one is Target model.
I used the Fusion Fireams on one and EGW - on the other - both are Ed Brown Style - the match in color is very good. I think ( not positive) the Fusion and the EGW are made by Ed Brown or vise versa - no difference in construction and assembly for two piece MSH/Magwells
I would recommed the Smith and Alexander - the blued finish is a a black blue and matt in finish - much closer to the Nitron matt finish - fits perfect!
I have the Smith Alex on my SS XO - either way - all are good MSH/magwells.
"...He that hath no sword, let him sell his garment and buy one." - Jesus, Luke 22:36