80% Lower Fire/Safe Marked – Anodized Black

About this product

What is the Trigger Logic 80% Lower Fire/Safe Marked – Anodized Black? It's a forged 7075-T6 aluminum AR-15 lower receiver with deep-engraved fire/safe markings, designed for builders who demand military-spec compatibility without the finished machining. This isn't a beginner's project part—it's raw material for experienced hands who understand tolerance stacking and proper jig alignment. You're buying the foundation, not the finished product, and the quality starts with the aluminum forging.

What is the 80% Lower Fire/Safe Marked – Anodized Black used for?

This lower serves as the starting point for custom AR-15 builds where the builder controls final machining and finishing. You'll need to complete the fire control group pocket, trigger pin holes, and safety selector recess using proper jigging equipment. The deep-engraved markings provide permanent reference points that survive even aggressive finishing work. This is for builders who want complete control over their lower's final dimensions and finish.

How does the 80% Lower Fire/Safe Marked – Anodized Black compare to the 80% Lower Fire/Safe Marked – Raw?

The anodized version provides immediate corrosion resistance that the raw aluminum version lacks. Where the raw lower requires immediate protective coating after machining, this black anodized finish withstands handling and storage without degradation. However, the raw version accepts cerakote and other finishes better than anodized surfaces. For builders planning immediate custom finishing, the raw version from our 80% Lower Fire/Safe Marked – Raw might be the better choice.

What does it weigh and what are the dimensions?

The unfinished lower weighs 8.2 ounces in its 80% state with rough dimensions of 9.25 inches long by 2.25 inches wide. After proper milling, expect final weight to drop to approximately 7.8 ounces—nearly identical to mil-spec forged lowers. The critical dimension is the 1.25-inch buffer tube thread depth, which measures within 0.002 inches of military specification right from the forging.

Who is this NOT for?

This isn't for first-time builders or anyone without access to proper milling equipment and jigs. If you can't maintain ±0.001 inch tolerances during machining, buy a finished lower instead. The anodized finish also makes re-finishing more difficult than raw aluminum, so builders planning complex cerakote patterns should consider alternatives. As detailed in our more on 80% Lower Receiver Jig Alignment Pin Specifications guide, precision requires proper tooling.

What's in the box?

You receive exactly one unfinished 80% lower receiver—no jigs, no pins, no additional hardware. The lower arrives with all critical areas protected by removable plugs that maintain dimensional stability during shipping. Total package weight with protective packaging is 12 ounces, and the box measures 10×4×3 inches. This is strictly the raw component, as Trigger Logic assumes builders already have the necessary tooling.

Is the 80% Lower Fire/Safe Marked – Anodized Black worth it at $89?

At this price point, it competes directly with billet options but offers superior forged strength. The $25 premium over raw aluminum versions buys you permanent corrosion protection and a professional appearance without additional finishing steps. For builders who value time over absolute customization potential, this represents solid value. Combined with our more on .308 80% Lower and LR-308/AR-10 Lower Parts Kit, you can build a complete lower assembly with proper components.