Abstract: An attachment system is provided for attaching an auxiliary apparatus to a weapon having a frame, and in particular to a weapon frame in the area forward of the trigger guard. An attachment mechanism on the auxiliary apparatus is adapted to be engageable with a rail on the weapon to selectively attach the auxiliary apparatus. The weapon may include a transverse slot which can be engaged by a portion of the auxiliary apparatus to prevent the auxiliary apparatus from sliding relative to the weapon due to recoil forces associated with firing the weapon.