AR9 80% Lower Fire/Safe Marked – 9mm – Billet

Overview

This billet AR9 80% lower receiver is precision-machined from 6061-T6 aluminum and features factory-engraved Fire/Safe markings. Designed specifically for 9mm builds, this AR9 80% lower fire/safe marked – 9mm – billet component requires final machining of the trigger pocket and fire control group areas before use. The lower is compatible with standard AR-15 LPK components and Glock-pattern 9mm magazines, offering a streamlined path for custom pistol-caliber carbine builds. Each unit is individually inspected for dimensional accuracy and surface finish consistency.

• Material: 6061-T6 billet aluminum, hard coat anodized black
• Caliber: 9mm (compatible with Glock-pattern magazine systems)
• Markings: Permanent laser-engraved Fire/Safe selector markings

Features & Specs

Manufactured from solid billet stock, this AR9 80% lower fire/safe marked – 9mm – billet receiver is CNC-machined to near-net shape with only the fire control pocket requiring completion. The anodized finish provides corrosion resistance and a uniform matte appearance. The lower incorporates a flared magazine well for rapid reloads and an integral trigger guard. All critical dimensions—including the buffer tower depth, takedown pin holes, and grip screw boss—are held to tight tolerances for reliable function once the fire control pocket is finished.

• Billet construction eliminates casting porosity; hard coat anodize per MIL-A-8625 Type III
• Factory-drilled rear takedown pin hole and hammer pin holes; trigger pin hole marked for reference
• Compatible with standard AR-15 buffer tubes, pistol grips, and fire control parts

Who It’s For

This AR9 80% lower fire/safe marked – 9mm – billet is intended for experienced builders who have the tooling and skills to complete the fire control pocket to ATF specifications. It is ideal for those constructing a dedicated 9mm pistol or carbine using Glock-pattern magazines, as it eliminates the need for adapters or block inserts. The Fire/Safe markings simplify selector installation and provide clear visual indication of fire control position. Builders who prefer billet receivers for their aesthetic consistency and structural integrity will find this component meets exacting standards. This product is not for novice builders; completing an 80% lower requires precise milling equipment and knowledge of fire control group geometry.

• Proper tooling required: milling machine or drill press with jig, router with jig, or CNC equipment
• Must comply with all federal, state, and local laws regarding firearm manufacture
• Not a functional firearm; must be machined to completion by the purchaser

Shipping & FFL

This AR9 80% lower fire/safe marked – 9mm – billet is not a firearm as defined by the Gun Control Act and may be shipped directly to your address without an FFL transfer. No background check is required for purchase, but you must be at least 18 years of age and legally permitted to possess firearm parts in your jurisdiction. Shipment is via UPS Ground or USPS Priority Mail. Some states and localities have enacted laws regulating or prohibiting 80% lowers; it is your sole responsibility to verify compliance with all applicable laws before ordering. We reserve the right to refuse or cancel any order that appears to violate federal or state regulations. By purchasing this product, you acknowledge that you are not prohibited by law from owning or manufacturing firearms and that you will complete the lower in compliance with all regulations. No returns on machined or modified parts. If you are uncertain about the legal status of 80% lowers in your area, consult a qualified attorney before purchasing.