Hi, all, I have a pietta 1873 clone, I know but i cannt aford a real colt. anyway the pistol in pretty nice, for what it is, My question is will a 3rd gen colt barrel fit this pistol, or do they use a differant pitch thread, i belive it a 24 pitch on it now. I have the 5.5 barrel and want to find a 4.75 colt barrel, if it will fit, Thanks