In Mosin's original design the spring was not attached to the base plate and, according to the commission, could be lost during cleaning.
Another detail is the form of the clip that could hold five cartridges to be loaded simultaneously into the magazine.
Another detail is the form of the "interrupter", a specially designed part within the receiver, which helps prevent double feeding.
The initial rifle proposed by Mosin lacked an interrupter, leading to numerous failures to feed.
Mosin eventually rose to the rank of Major General and was appointed as the director of the Sestroretsk arsenal.