Steyr AUG SA Hammer Group

With the exception of a small number of parts, the AUG's hammer assembly is constructed of polymer. It is controlled from the trigger via two rods that link the trigger with the disconnector. The bolt catch is also incorporated into the front of the hammer assembly and is actuated by the magazine follower. This unit's compact and modular design allows it to be withdrawn from the stock simply by removing the butt plate. In the unlikely event of parts failure, the user can insert a new unit without dismantling the entire weapon.

Steyr AUG FA Hammer Group With Tri-burst Mechanism