I have not seen a list of 1911 makers who use Wilson or Para ramps in their frames. Here's what I know of. Feel free to add.
Para ramp
RIA, Tisas, Dan Wesson, Ed Brown
Wilson ramp
Springfield, Kimber, Sig, Fusion, Smith Wesson, Bul
What's your thoughts about bull barrels on 1911's? I've owned a few over the years, only have one now in the DW ECP. I'm not a bullseye shooter but could never tell much difference in bull vs standard in regards to accuracy for close range 1911 use. Bull barrels on all 4" 1911s that I have seen...