The TacFire MAR120 Firing Pin 5.56x45mm NATO Hard Chrome Steel for AR15/M16 is a precision-machined replacement pin built to keep your AR-15 or M16 running smoothly. Crafted from durable 4140 steel and finished in hard chrome, it is designed to deliver consistent primer strikes and dependable ignition in standard 5.56x45mm NATO bolt assemblies.

This firing pin is sized specifically for AR-15 and M4 platforms, making it ideal for completing a new build or refreshing a well-used rifle with a factory-style component. Its hard chrome surface helps resist fouling and corrosion while promoting smooth travel inside the bolt carrier group. TacFire’s attention to detail and solid reputation in AR-platform parts make the MAR120 a straightforward, reliable upgrade or replacement.

Key Features:

• Manufacturer: TacFire
• Model: MAR120 Firing Pin
• Caliber: 5.56x45mm NATO
• Condition: New
• Type: Firing Pin
• Material: 4140 Steel
• Finish: Chrome / Hard Chrome
• Firearm Fit: AR-15, M16, AR-15/M4 Platforms
• Length: 3.28 in
• Weight: 0.30 oz