* Introduced in 1894
* Designed for target shooting and hunting
* Has a longer barrel and a higher front sight than the Frontier Six-Shooter
* The grip is also different, with a more pronounced curve at the bottom
* Chambered for .38-40 Win., .44-40 Win., and .45 Colt
Colt Single Action Army Frontier Six-Shooter
* Introduced in 1873
* Designed for the military and law enforcement
* Has a shorter barrel and a lower front sight than the Bisley Model
* The grip is also different, with a less pronounced curve at the bottom
* Chambered for .44-40 Win. and .45 Colt
So, the main differences between the Colt SAA Bisley Model and the Frontier Six-Shooter are the barrel length, front sight height, grip shape, and chambering.