KNS Precision AR-15 Firing Pin Retaining Pin Black

The KNS Precision AR-15 firing pin retaining pin keeps your bolt carrier group functioning reliably through thousands of rounds. Built on a design that traces back to Eugene Stoner's original AR-15 prototype, this retaining pin secures the firing pin in place so it won't drift or shift under recoil. It's a small part that does a big job: preventing the kind of malfunction that can ruin a match or hunt. If you're serious about AR-15 reliability, this is the kind of detail that separates a dependable rifle from one that leaves you guessing.

The pin is machined from heat-treated steel, which balances strength with the slight flex needed to snap into place and stay put. It works with any standard AR-15 bolt-carrier group, so whether you're running a factory BCG or a precision match unit, it'll drop right in. The black finish resists corrosion and blends seamlessly with the rest of your carrier group. Installation is straightforward—no gunsmithing required.

This is the kind of upgrade that doesn't grab headlines but absolutely deserves a spot in your build. Shooters who pay attention to these fundamentals end up with rifles that run flawlessly year after year. Drop one in and forget about it.

Key Features

• Heat-treated steel construction for durability and reliability
• Works with any standard AR-15 bolt-carrier group
• Design based on the original AR-15 prototype firing pin retaining pin
• Black finish resists corrosion
• Simple installation—no special tools required

Specifications

Frequently Asked Questions

Will this retaining pin work with my AR-15 bolt-carrier group?

Yes, it's designed to work with any standard AR-15 BCG. It will not work with .308 bolt-carrier groups.

What's the advantage of upgrading the firing pin retaining pin?

A quality retaining pin keeps your firing pin securely seated and prevents drift or shift under recoil. This improves reliability and consistency, especially over thousands of rounds.

Do I need a gunsmith to install this?

No. Installation is straightforward and requires no special tools or gunsmithing knowledge.

What material is this pin made from?

It's machined from heat-treated steel, which provides both strength and the controlled flex needed to function reliably in your carrier group.