80% Lower Fire/Safe Marked - Anodized Black - polymer 80
Pros & cons
What works
- Weighs 14.2 oz — 4 oz lighter than the Polymer80 PF940V2
- Anodized black finish resists wear and UV degradation
- Pre‑etched fire‑safe imprint saves ~30 minutes of compliance work
Trade-offs
- No stippling pre‑installed — adds $40‑80 finishing step
- Requires a 0.28 in. drill for the fire‑safe hole
- Polymer may flex under heavy load compared to aluminum
Video review
Expert review
Specs at a glance
About this product
What is the 80% Lower Fire/Safe Marked - Anodized Black? It is a CNC‑machined polymer lower receiver, pre‑marked for California fire‑safe compliance, finished in a matte black anodized coating.
This lower is designed for AR‑15 builds that require a legal 80% component, offering a ready‑to‑drill platform with precision‑aligned rails for spectre conversions.
What is the 80% Lower Fire/Safe Marked used for?
It is used to assemble a fully functional AR‑15 rifle after the buyer completes the required milling steps.
The lower provides the base for the trigger group, buffer assembly, and fire‑safe serial imprint, making it suitable for custom builds and ready‑mod kits.
How does the 80% Lower Fire/Safe Marked compare to the 80% Lower Fire/Safe Marked - Raw?
It is better than the raw version because the anodized finish adds 0.2 lb of durability and resists wear, while the raw lower requires additional surface treatment.
The anodized model also includes factory‑etched fire‑safe markings, saving ~30 minutes of compliance work compared to the raw counterpart.
What does it weigh and what are the dimensions?
It weighs 14.2 oz (403 g) and measures 9.5 in × 2.3 in × 0.8 in (241 mm × 58 mm × 20 mm).
The compact footprint fits standard AR‑15 stocks and buffer tubes without modification.
Who is this NOT for?
It is not for buyers who need a fully finished lower ready for immediate firing without any machining.
Those seeking a stainless steel lower or an already drilled upper receiver will find this product unsuitable.
What's in the box?
The box contains one anodized polymer lower, a fire‑safe imprint label, and a PDF of the official milling guide.
All items are packed in a 12 × 8 × 2 in (305 mm × 203 mm × 51 mm) cardboard box.
Is the 80% Lower Fire/Safe Marked worth it at $54?
Yes, at $54 it delivers a compliant, ready‑to‑drill platform for under $1 per gram of weight.
Compared with the $68 raw version, you save $14 while gaining a protective finish and pre‑marked compliance, making it a cost‑effective choice for California builds.
For more on rail alignment, see The Complete Guide to Adjusting Slide Stop Tension in Spectre Kits or check the alternative .308 80% Lower – Billet for a different material option.
Key attributes
| Weight | 14.2 oz |
| Color | Anodized Black |
| Material | Polymer (high‑impact) |
| Condition | New |
| Fire Safe | Pre‑marked for California compliance |
| Dimensions | 9.5 in x 2.3 in x 0.8 in |
Frequently asked questions
- Is it compatible with the Spectre trigger group?
- Yes, the lower’s rail spacing matches the Spectre trigger group, and the factory‑drilled mounting holes align within ±0.02 in. You will need a standard 0.28 in. drill for the fire‑safe hole.
- Does it fit a standard AR‑15 buffer tube?
- It fits any 1.0‑in. press‑fit or 1.1‑in. threaded buffer tube. The internal pocket is 0.55 in. deep, matching the dimensions of most commercial tubes.
- How long does shipping take?
- Standard US shipping averages 3‑5 business days. Expedited options are available for an additional $9.95 and arrive in 1‑2 days.
- Can I return it if it doesn't fit?
- Returns are accepted within 30 days of receipt, provided the lower is in its original, undrilled condition. A restocking fee of 15 % applies.
- Does this work with the Polymer80 RL556V3™ Buffer Tube?
- Yes, the lower mates with the RL556V3™ buffer tube without modification; the tube’s 1.0‑in. press‑fit design aligns perfectly with the lower’s dimensions.