A firearm assembly including a first weapon having a first receiver is disclosed. The first receiver includes a front end with a barrel attached to the front end and a front sight attached to the barrel. A second weapon is selectively mounted to the first weapon and movable between an engaged and disengaged position. The second weapon includes a second receiver and a mounting system having a first portion attached to the second receiver and a second portion coupled to the second receiver. The first portion is coupled to the front sight to define a first attachment point when the second weapon is in the engaged position. The second portion includes a first end coupled to the front sight to define a second attachment point and a second end coupled to the first receiver to define a third attachment point when the second weapon is in the engaged position.