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

Overview

This AR9 80% lower fire/safe marked – 9mm – billet component is a precision-machined foundation for building a dedicated 9mm pistol or rifle. Designed for the serious builder, this lower receiver is manufactured from solid billet aluminum and features clearly engraved fire/safe markings. The 9mm-specific geometry eliminates the need for magazine adapters or spacers, accepting standard Glock-pattern magazines directly. As an 80% lower, it requires final machining of the fire control cavity, trigger pin holes, and hammer pin holes before assembly, offering the legal latitude of a non-serialized receiver for personal fabrication.

Features & Specs

Machined from 6061-T6 billet aluminum, this AR9 80% lower fire/safe marked – 9mm – billet receiver is built to exacting tolerances. The fire/safe markings are laser-engraved into the lower receiver body for durability and clarity. All critical dimensions are oversized by approximately 0.005 inches to allow for final finishing to your specifications. The billet construction provides increased material density compared to forged receivers, with a uniform grain structure that resists stress cracking. The lower is compatible with standard AR9 upper receivers, bolt carrier groups, and LPK components designed for 9mm platforms. The pocket depth is pre-machined to 80% completion, with the trigger and hammer pin boss areas left solid for final drilling and reaming.

• Material: 6061-T6 billet aluminum, hardcoat anodized black finish
• Caliber: 9mm, accepts Glock-style magazines (G17, G19, G26)
• Markings: Ambidextrous fire (F) and safe (S) engravings, no manufacturer markings
• Precision: CNC-machined from solid billet with +0.005″ oversized pin holes

Who It’s For

This AR9 80% lower fire/safe marked – 9mm – billet is intended for the experienced home gunsmith or small-volume fabricator who requires a dedicated 9mm platform. It is suited for builders who prefer the rigidity and aesthetics of billet over forged receivers, and who want the flexibility to complete the lower with their preferred trigger, grip, and stock configuration. The Glock magazine compatibility makes it ideal for shooters who already own 9mm Glock handguns and want magazine interchangeability. This lower is not for beginners; it requires access to a drill press, mill, or jig system, along with appropriate reamers and end mills to complete the fire control pocket and pin holes to exact specifications.

• Experienced builders with machining skills and proper tooling
• Shooters seeking a dedicated 9mm AR platform without magazine adapters
• Those who prefer billet receivers for their dimensional consistency and weight

Shipping & FFL

Because this is an 80% lower receiver and not a finished firearm, it does not require transfer through a Federal Firearms License (FFL) holder for shipment. It may be shipped directly to your residence in most states. However, you must verify that local and state laws permit the possession and completion of 80% receivers. Some jurisdictions impose restrictions, registration requirements, or outright bans on unserialized firearm components. It is your responsibility to ensure compliance with all applicable laws before purchase. This product is sold as a raw component for personal fabrication only and is not intended for resale as a completed firearm without proper licensing.

• Ships directly to your residence without FFL transfer (check local laws)
• No serial number; final machining required before assembly
• Not for sale in states or localities that restrict 80% receivers (e.g., California, New York, New Jersey, Washington D.C.)