Polymer80 PF45 80% Pistol Frame ONLY - polymer 80
About this product
What is the Polymer80 PF45 80% Pistol Frame ONLY? It is a CNC‑machined polymer lower receiver designed for Glock‑style 9mm pistols, sold as an unfinished 80% frame for self‑assembly.
The PF45 offers a lightweight platform at 14.2 oz (402 g) and a compact dimension of 4.7 in (119 mm) height, making it ideal for competition and concealed carry builds. ArcForge Arms provides a ready‑to‑machine kit that eliminates the need for extra jigs, letting builders focus on fit and finish.
What is the Polymer80 PF45 80% Pistol Frame used for?
The frame serves as the core structure for a 9mm Glock‑type pistol, providing mounting points for the trigger, slide, and magazine well.
Its polymer construction reduces overall weight while maintaining the rigidity required for rapid fire cycles. Builders typically pair it with a compatible slide, barrel, and fire control group.
How does the Polymer80 PF45 compare to the Polymer80 PF940V2?
The PF45 is 0.8 in (20 mm) shorter in overall length than the PF940V2, resulting in a 0.3 oz lighter frame.
While both share the same polymer matrix, the PF45’s reduced size improves draw speed, but the PF940V2 offers a more traditional grip length for larger hands.
What does it weigh and what are the dimensions?
The frame weighs 14.2 oz (402 g) and measures 4.7 in (119 mm) tall, 1.3 in (33 mm) wide, and 6.5 in (165 mm) long.
These dimensions fit standard Glock‑compatible magazines and allow for a comfortable grip on most hand sizes.
Who is this NOT for?
This frame is not suitable for users seeking a fully finished pistol without any machining or finishing work.
Builders who lack basic CNC tools or a 3‑D printed jig will need to invest additional time and money, and those requiring a steel frame for extreme durability may prefer an aluminum lower.
What's in the box?
The package includes one 80% polymer lower receiver, a pre‑drilled jig template, and a QR code linking to assembly videos.
All components are shipped in a discreet, recyclable box; no slides, barrels, or fire control groups are included.
Is the Polymer80 PF45 worth it at $180.99?
At $180.99, the PF45 provides a cost‑effective foundation for a custom 9mm pistol, especially compared to a complete factory Glock priced above $500.
The price includes a precision‑engineered lower and a reusable jig, saving roughly $120‑$150 over purchasing a finished lower from other brands.
For builders who value weight savings and modularity, the PF45 offers solid value, but only if you have the tools to complete the build.
For more lower options, see the .308 80% Lower – Billet or read our Complete FAQ on the 80% Lower Registration Process.
Specs at a glance
Video review
Pros & cons
What works
- Weighs 14.2 oz – 0.3 oz lighter than the PF940V2
- Compact 4.7 in height improves concealability
- Includes reusable CNC jig, saving $40‑$60 on accessories
Trade-offs
- No pre‑stippled grip texture – requires finishing step
- Requires CNC milling or 3‑D printed jig for completion
- Limited to 9mm Glock‑type builds; not a universal frame
Expert review
Key attributes
| Caliber | 9mm Luger |
| Capacity | 15 rounds (Glock 19 magazine) |
| Frame Material | Polymer |
| Weight | 14.2 oz (402 g) |
| Dimensions | 4.7 in (119 mm) height × 1.3 in (33 mm) width × 6.5 in (165 mm) length |
| Condition | 80% unfinished lower |
Frequently asked questions
- Is it compatible with Glock 19 magazines?
- Yes, the PF45 is engineered to accept standard Glock 19 magazines, which hold 15 rounds. The magazine well dimensions are 0.81 in (21 mm) wide, matching Glock specs. This ensures reliable feeding without modification.
- Does it fit a standard Glock 17 slide?
- The PF45 aligns with a Glock 17 slide, but the shorter grip length may require a slide sleeve for optimal fit. Most builders add a 0.2 in (5 mm) adapter to maintain proper slide travel.
- How long does shipping take?
- Standard US shipping averages 3‑5 business days after processing. Expedited options deliver in 1‑2 days for an additional $15. International orders typically arrive within 7‑10 days.
- Can I return it if it doesn't fit?
- Returns are accepted within 30 days if the frame is unopened and in original condition. A restocking fee of $20 applies due to the specialized nature of the product.
- Does this work with a polymer grip module?
- The PF45 accepts aftermarket polymer grip modules; a popular choice is the 4.5 in (114 mm) Black Grip Kit from ArcForge Arms, which adds texture and a 0.2 in (5 mm) length increase.