Length of pull

Length of pull (sometimes abbreviated as LOP) is the distance from the trigger to the part of a rifle or shotgun which fits against the shoulder of the shooter.

Length of pull is an important ergonomic factor for ease of use; and optimum length of pull may vary with the size of the shooter, the thickness of chest clothing and body armor being worn,[1] and whether the shooter is firing from a standing, sitting, or prone position.

Shooters with broad shoulders or a long neck may experience face injuries from collision with the telescopic sight or thumb of the trigger hand as the firearm recoils.

Modern firearms may be equipped with a telescoping stock or removable spacers to adjust the length of pull.

[7] When a properly adjusted try-gun is held in a firing position, the shooter's nose should be about two finger-widths behind the thumb of the trigger hand.