LBE Unlimited AR-15 Front Sight Base Kit - Black (ARFSBKIT)

The LBE Unlimited AR-15 front sight base kit is a complete, ready-to-install solution for builders and gunsmiths setting up an AR-platform rifle with iron sights. This kit bundles everything needed to mount a functional front sight to your upper receiver—no trips back to the parts bin for missing fasteners or springs. It's the kind of practical approach that saves time on the bench and gets your rifle running sooner.

The front sight base comes F-marked, a detail that matters if you're building or restoring a rifle with period-correct or mil-spec aesthetics. Whether you're assembling a new AR, replacing a damaged sight base, or setting up a backup iron sight system, having all the components in one kit eliminates the guesswork and the likelihood of mismatched or substandard parts.

LBE Unlimited has built a reputation for straightforward, no-frills AR-15 parts that work reliably in the field. This front sight base kit reflects that philosophy—quality manufacturing without the marketing markup, just the hardware and hardware know-how you need.

Key Features

• F-marked front sight base for mil-spec AR-15 uppers
• Complete kit includes sight post, detent, spring, taper pins, swivel, and swivel rivet
• No additional fasteners required—everything needed for installation is included
• Black finish

Specifications

Frequently Asked Questions

Will this front sight base kit fit my AR-15 upper?

This kit is designed for AR-15 uppers with a mil-spec sight base mounting surface. The F-marked base is standard for most mil-spec AR platform uppers. If you're unsure about compatibility with your specific upper, consult your upper receiver manual or reach out to our team.

What's included in the kit?

The kit includes the front sight base, sight post, detent, spring, taper pins, swivel, and swivel rivet—all the parts necessary to complete a functional front sight assembly without purchasing additional fasteners.

Is this suitable for a first AR build?

Yes. If you're building an AR-15 with iron sights, this complete kit removes the hassle of sourcing individual components. It's also a practical choice for gunsmiths and experienced builders who value having matched parts from a single source.