Old model vaquero vs black Hawk in SASS Wire Posted September 21 · Edited September 21 by Roscoe Regulator 15 hours ago, Abe E.S. Corpus SASS #87667 said: The New Model Flattop is also available in .45 caliber. I think all the ones I have seen are convertibles. I agree, though, no “Ruger only” level .45 Colt loads in the Flattop. My 44 Magnum Anniversary Flat Top was a larger frame than my 44 Special. I also have a 41 Mag Flat Top but have no comparison for frame size. If anything limits the firepower on the Flat Tops it is the grip size. I have the parts for a Bisley conversion on the 41 but haven't moved forward yet with that project. I sold the 44 Mag and used the money for my SBH Bisley, which solved my problem there. I don't believe 41 and 44 are offered anymore in Flat Top, which for me were a way to get indexing on the loading gate, unlike my SBH.