dsk, of course everybody knew he meant for a 1911. What other pistol has "beavertails" made for it? And then the "original spur hammer" is another hint.
I have more than one 1911 equipped with the wide spur hammer and flat beavertail GS from King's gun Works. I have not had a set, as of yet, that did not work correctly. And if there was any interference, it would be little work to remove a bit of the hammer and reblue it.