A rifle configuration in which the action and magazine are located behind the trigger. This is done so the length of pull is shorter than it otherwise would be, but is controversial because it puts the receiver very close to the shooter's face.

A design methodology for rifles'Bullpup' rifles such as the AUG and the British SA80 have the magazine and firing mechanism set behind the trigger and grip, instead of the more traditional layout where the magazine is in front of the grip (see the M16, AK47, G36, etc...).  This results in a much longer barrel without increasing the length of the gun, which increases accuracy without making the gun difficult to carry.