This Mil-Spec Hammer for AR-15 is a direct-fit fire control hammer from Sons of Liberty Gun Works (brand part no. HAMMER), built to mil-spec dimensions for standard AR-15 lower receivers. The hammer is struck by the trigger’s release and, in turn, strikes the firing pin to fire the round, making it one of the core parts of the fire control group. It’s a straightforward replacement for a worn hammer or a build using individual mil-spec fire control parts instead of a complete kit.

Key Specifications

• Functions as the hammer in the fire control group, striking the firing pin when released by the trigger.
• Built to mil-spec dimensions for standard AR-15 lower receivers.

Frequently Asked Questions

What does the hammer do? It’s struck by the trigger’s release and in turn strikes the firing pin, firing the round.

Is this hammer mil-spec sized? Yes, it’s built to mil-spec dimensions for standard AR-15 lower receivers.

Buy the Mil-Spec Hammer for AR-15

Replace a worn fire control hammer with this Sons of Liberty Gun Works mil-spec part sized for standard AR-15 lowers. It ships fast from our Lubbock, Texas gun shop, and our small AR-15 parts selection has more small AR-15 parts.