P80 Thr/Flu Brl N/Sght 15rd - polymer 80
About this product
What is the P80 Thr/Flu Brl N/Sght 15rd polymer 80? It is a 15‑round, threaded‑for‑flu barrel lower kit engineered for 9mm AR‑style builds, supplied without a factory-installed sight.
The kit blends ArcForge’s CNC‑precision polymer with a reinforced steel insert, delivering the durability of a metal lower at a fraction of the weight. Designed for competitive shooters who want a ready‑to‑assemble platform without aftermarket incompatibilities.
What is the P80 Thr/Flu Brl N/Sght 15rd used for?
It is used to build a complete 9mm pistol that accepts a threaded barrel for suppressors or muzzle devices. The polymer lower accommodates a 15‑round magazine well and includes a trigger group ready for assembly, letting you focus on tuning the barrel and optics.
How does the P80 Thr/Flu Brl N/Sght 15rd compare to the 80% Lower Fire/Safe Marked - Raw?
It outperforms the Raw model in rigidity and weight, weighing 14.8 oz versus 17.3 oz, thanks to an internal steel reinforcement that reduces flex during rapid fire.
What does it weigh and what are the dimensions?
The lower weighs 14.8 oz (420 g) and measures 7.5 in × 4.3 in × 1.2 in (190 mm × 110 mm × 30 mm). These dimensions keep the overall pistol length under 8 in, ideal for concealed carry or competition bins.
Who is this NOT for?
This kit is not for beginners who lack basic gunsmithing tools; it requires a drill press and a basic understanding of trigger assembly. First‑time builders should start with a fully finished lower to avoid fit issues.
What's in the box?
The package includes a polymer lower with integrated steel insert, a mil‑spec trigger group, a 15‑round magazine well plate, two M4.0×20 screws, and a printed CNC file for optional stippling. No barrel, slide, or sights are included.
Is the P80 Thr/Flu Brl N/Sght 15rd worth it at $569?
Yes, the price is justified by the CNC‑toleranced polymer, steel reinforcement, and ready‑to‑install trigger group, delivering performance comparable to a $750 metal lower kit while saving roughly 2.5 lb in weight.
For more on building lower receivers, see our .308 80% Lower – Billet or read the ArcForge Arms Bulk Order Lead Times guide.
Specs at a glance
Video review
Pros & cons
What works
- Weight 14.8 oz — 2.5 oz lighter than comparable metal lowers
- Integrated steel insert boosts rigidity by 18 % in stress tests
- Threads ready for 1/2‑×‑28 suppressor up to 4.5 in length
Trade-offs
- No factory sights — requires separate purchase (~$30)
- Requires basic CNC drilling for final fit, adding 30‑45 min setup time
- Polymer may yellow after prolonged UV exposure, needing protective coating
Expert review
Key attributes
| Caliber | 9mm Luger |
| Capacity | 15 rounds |
| Barrel Thread | 1/2‑×‑28 (Muzzle Device Ready) |
| Weight | 14.8 oz (420 g) |
| Dimensions | 7.5 in × 4.3 in × 1.2 in (190 mm × 110 mm × 30 mm) |
| Color | Matte Black |
| Condition | New |
| Frame Material | Polymer with internal steel reinforcement |
Frequently asked questions
- Is it compatible with Glock‑compatible magazines?
- Yes, the lower is engineered for Glock‑style 15‑round magazines. It accepts any standard 9mm Glock magazine up to 15 rounds without modification.
- Does it fit a 4.5‑in suppressor?
- The threaded barrel option supports suppressors with a 1/2‑×‑28 thread up to 4.5 in in length, providing up to 0.75 in of added overall length.
- How long does shipping take?
- Standard US shipping averages 3‑5 business days after payment clearance; expedited options can deliver in 1‑2 days for an additional $25.
- Can I return it if it doesn't fit?
- Returns are accepted within 30 days of receipt, provided the lower is unused and in original packaging; a restocking fee of 15 % applies.
- Does this work with the ARC‑Fusion 9mm slide?
- The lower aligns with the ARC‑Fusion 9mm slide’s mounting points, allowing a seamless fit without drill‑and‑tap modifications.