you should ignore any sad pedants who point out that Blondie and Tuco used the Colt Navy, but Angel Eyes preferred the Remington... ;-)

It probably isn't even the real Angel Eyes! (If you want to be pedantic, Angel Eyes died sometime during the American Civil War (apparently 1862), which ended in 1865 - the review is from several years later. And in the film, Tuco shot someone while having a bath)

Edit : Apparently, Angel Eyes also used a Colt Navy as well as the Remington.

www.imfdb.org/wiki/Good,_The_Bad,_and_The_Ugly,_The#Remington_1858_New_Army