Length of pull (LOP) refers to the distance from the trigger to the end of the stock (or butt) of a firearm. It is a critical measurement for fitting a shotgun or rifle to a shooter, as it affects comfort, control, and overall shooting accuracy. A proper length of pull allows the shooter to maintain a good shooting stance, with their eye aligned with the sights or optic, while also allowing for a proper grip on the firearm.
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