The Armaspec AR-15 Firing Pin (brand part no. ARM681-SS) is a precision-machined replacement firing pin built for standard AR-15 bolt carrier groups. Armaspec machines the pin from 17-4 stainless steel and heat-treats it to the H900 condition for consistent hardness under repeated firing-pin strikes. A worn or pitted factory firing pin is a common source of light primer strikes and failures to fire, and swapping in a hardened stainless replacement is one of the simplest ways to restore reliable ignition. This pin drops straight into a standard mil-spec AR-15 bolt carrier group with no fitting required, making it a practical upgrade for a range gun, home-defense rifle, or competition build alike.

Key Specifications

• Machined from 17-4 stainless steel, a corrosion-resistant alloy that holds up to repeated firing-pin impact.
• Heat-treated to the H900 condition for a hard, wear-resistant strike face that resists peening over time.
• Built as a direct-fit replacement for standard AR-15 bolt carrier groups, requiring no modification to install.

Frequently Asked Questions

What is the Armaspec AR-15 Firing Pin made from? It is machined from 17-4 stainless steel and heat-treated to the H900 condition for a hard, corrosion-resistant strike face.

Will this firing pin fit my AR-15 bolt carrier group? Yes, it is a direct-fit replacement for standard mil-spec AR-15 bolt carrier groups with no modification required.

Buy the Armaspec AR-15 Firing Pin

Keep your AR-15 striking primers reliably with a hardened stainless firing pin built to outlast the factory part. Browse Schaefer Defense’s small AR-15 parts selection and order from our Lubbock, Texas gun shop — we’ll get it out to you as soon as it’s ready to ship.