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compact and modular design allows it to be withdrawn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