Firearm stocks are typically fixed in a single position, and the end of the stock (normally a butt pad) is designed to fit into a user's shoulder pocket. Because the stock is fixed, the user must acclimate to the position of the stock. However, there can be significant variation in the shape and size of a user's shoulder. Such variation can result in discomfort, inaccurate, and unsafe shooting positions. Moreover, a user's clothing and load out can significantly vary from one situation to another. Although available contemporary stock assemblies provide for adjusting an aspect of the stock, making the adjustment normally requires manipulating one or more unlocking one or more elements, and cannot be done without a special tool or under duress. As a result, the stock position cannot be easily adjusted under duress. What is needed is an ability for a firearm user to easily and conveniently adjust the position of the end of the stock in horizontal position of the buttstock.