Although it is listed under semi-auto rifles, the Faxon Firearms Sentry (brand part no. LR-FAX-Complete-01) is actually a complete AR-15 lower receiver, not a finished, ready-to-fire rifle. It is the serialized firearm component that a buyer completes with an upper receiver, barrel, and bolt carrier group to build a functioning rifle or pistol. Faxon builds the Sentry lower from forged aluminum and marks it multi-caliber, so it can serve as the foundation for a wide range of AR-15 builds. It suits shooters who want to start a custom build from a quality, American-made lower rather than buying a complete rifle.

Key Specifications

• This is a complete lower receiver only, not a finished rifle; an upper receiver assembly is required to build a functioning firearm.
• Marked multi-caliber, so it can be built out for a wide range of AR-15 chamberings.
• Machined from forged aluminum for durability.
• Ships complete, with the fire control group, trigger guard, and pistol grip already installed.
• Measures approximately 19.05 inches in its shipped configuration.

Frequently Asked Questions

Is this a complete, ready-to-fire rifle? No, it is a complete lower receiver only. You will need an upper receiver assembly to build a functioning firearm.

What calibers can this lower be built in? It is marked multi-caliber, so it supports a wide range of AR-15 chamberings depending on the upper you pair with it.

Buy the Faxon Firearms Sentry AR-15 Complete Lower Receiver

Start your next build with a quality forged lower. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and check out more Faxon Firearms products alongside other semi-auto rifles.