The Model 1887 is used by the Ultranationalists in their armories in "Loose Ends" and the Militia in combat during "The Hornet's Nest" and in some cases "Takedown". It can also be found in the "Museum".
The Model 1887 is unlocked at level 67, making it the last unlocked shotgun. Prior to the patches, it was considered to be the most powerful shotgun available. It had the longest range and the option to use Akimbo, which countered its rather slow fire-rate. The 1.07 patch decreased the range of the Akimbo 1887s drastically - this was to counter complaining that the akimbo shotguns were too powerful. However, a mistake was made during the patch which did not remove range of the Blinged FMJ and Akimbo Model 1887, which then prompted the 1.08 patch which rectified the mistake. After the 1.07 patch, the 1887 received much less use due to the fact that it's outperformed by the SPAS-12 which has roughly the same range but faster rate of fire, and is unlocked much sooner.
Although the wooden stock of the 1887 is sawn off, it still has average accuracy. It is a very potent weapon on its own, especially with Stopping Power and Steady Aim, which increases the chances of a one-hit-kill. One main problem with the weapon when not using akimbo, is that it has a very slow rate of fire, due to the lever action. When used with Akimbo, its fire rate is increased, but has a range similar to the Ranger, while the single 1887 has the same range as before the patches.