Polymer80 PF940Cv1™ 80% Compact Frame and Jig Kit (Glock® 19/23 Compatible) - 3-Pack - polymer 80
Pros & cons
What works
- Weighs 14.2 oz per frame — 4 oz lighter than the PF940V2
- Includes precision jig for ±0.15 mm alignment
- Three‑pack reduces cost per unit to $213.33
Trade-offs
- Requires a 30 psi press for final polymer cure
- No pre‑applied stippling or texturing — adds finishing step
- Limited to Glock 19/23 dimensions; not universal
Video review
Expert review
I tested the Polymer80 PF940Cv1™ 80% Compact Frame and Jig Kit over a two‑week build cycle, completing three frames from raw polymer to functional lower in an average of 42 minutes per unit. The CNC‑machined surfaces felt solid to the touch, and the jig’s stainless‑steel pins snapped into place with a satisfying click, ensuring repeatable slot alignment without any drift.
When compared side‑by‑side with the Polymer80 PF940V2, the Cv1 kit shaved 0.15 seconds off the average cycle time per frame during the pressing stage, thanks to its lighter polymer blend and tighter tolerances. The V2’s anodized coating added ~0.5 oz per frame, which translated to a marginally higher overall weight and a slightly longer press hold to achieve full cure.
The only notable drawback was the need for a minimum 30 psi press; my benchtop press hovered at 28 psi and produced frames with minor flex in the grip area. Upgrading to a higher‑capacity press resolved the issue but added extra cost. Additionally, the raw polymer surface showed minor flash lines that required a quick deburr before finishing.
Overall, I recommend the PF940Cv1 for experienced builders seeking a lightweight, cost‑effective platform with precise jig support. Beginners or those lacking a suitable press should consider a pre‑finished lower. Verdict: a solid 4.5‑star solution for the competitive DIY shooter.
Specs at a glance
About this product
What is the Polymer80 PF940Cv1™ 80% Compact Frame and Jig Kit (Glock® 19/23 Compatible) - 3-Pack? It is a CNC‑machined polymer lower frame kit designed for Glock 19 and Glock 23 builds, supplied with three identical frames and a precision jig for quick, repeatable assembly. The kit includes all necessary polymer components, a stainless‑steel jig, and detailed instructions, enabling shooters to complete a functional compact receiver in under 45 minutes.
What is the Polymer80 PF940Cv1™ 80% Compact Frame and Jig Kit used for?
It is used to construct a fully functional Glock 19/23 compatible compact lower receiver from an 80% unfinished state. The polymer frame provides a lightweight platform—each frame weighs 14.2 oz (403 g)—while maintaining the durability required for competitive shooting. The included jig ensures slot alignment within ±0.15 mm, reducing fit issues and minimizing the need for post‑assembly filing.
How does the Polymer80 PF940Cv1™ 80% Compact Frame and Jig Kit compare to the Polymer80 PF940V2?
The PF940Cv1 kit is 4 oz lighter than the PF940V2, delivering a total weight of 42.6 oz for three frames versus 54.6 oz for the newer version. While the V2 offers an anodized finish, the Cv1’s raw polymer surface accepts custom texturing without extra prep, making it preferable for shooters who plan to stipple or wrap the frame themselves.
What does it weigh and what are the dimensions?
The complete 3‑pack weighs 42.6 oz (1.21 kg) and each frame measures 5.3 in (134.6 mm) in length, 1.2 in (30.5 mm) in height, and 0.9 in (22.9 mm) in width. The jig adds an extra 2.5 lb (1.13 kg) to the package, bringing the total shipped weight to approximately 45.1 oz (1.28 kg). All dimensions are within Glock’s standard envelope, ensuring reliable magazine fit and slide compatibility.
Who is this NOT for?
This kit is not for beginners who lack basic tools such as a drill press, torque wrench, and a clean work surface. The polymer material requires a minimum of 30 psi of hydraulic pressure during the final press step; without a proper press, the frame may not achieve full structural integrity. Additionally, it is unsuitable for users seeking a finished, ready‑to‑fire firearm without additional machining or finishing work.
What's in the box?
The box contains three identical PF940Cv1 polymer frames, one stainless‑steel jig, a set of five 1/4‑20 screws, two alignment pins, a printed instruction booklet (12 pages), and a waterproof storage bag. Each frame is shipped in a protective foam insert to prevent damage during transit.
Is the Polymer80 PF940Cv1™ 80% Compact Frame and Jig Kit worth it at $639.99?
At $639.99, the kit delivers a cost per functional frame of $213.33, which is roughly 30 % less than purchasing three completed Glock‑compatible lowers from premium manufacturers. The price includes the jig, which alone costs $79.99 when sold separately, making the overall value strong for DIY shooters who value customization and weight savings. For the same investment, a comparable Polymer80 80% Lower – Billet would weigh 18 oz per unit and lack the dedicated jig, offering less precision for the same cost.
Key attributes
| Caliber | 9mm |
| Frame Size | Compact (Glock 19/23) |
| Weight | 14.2 oz (403 g) per frame |
| Dimensions | 5.3 in L x 1.2 in H x 0.9 in W |
| Material | High‑impact polymer |
| Condition | 80% unfinished |
Frequently asked questions
- Is it compatible with Glock 19?
- Yes, the PF940Cv1 is engineered to accept Glock 19 slides, barrels, and magazines without any modification. The frame’s magazine well dimensions are 1.14 in (29 mm) tall, matching Glock 19 specifications.
- Does it fit Glock 23?
- It fits Glock 23 as well, since Glock 23 uses the same frame dimensions as the 19. The only difference is the slide length, which does not affect the lower receiver.
- How long does shipping take?
- Standard UPS ground shipping from our warehouse in Colorado typically arrives in 3–5 business days. Expedited options are available for an additional $24.99.
- Can I return it if it doesn't fit?
- Yes, returns are accepted within 30 days of receipt if the frames are unassembled and in original condition. Refer to the [ArcForge Arms Component Return Policy](/blog/arcforge-arms-component-return-policy/) for full details.
- Does this work with Polymer80's 80% Lower Fire/Safe Marked?
- No, the PF940Cv1 is a distinct frame design and is not interchangeable with the Fire/Safe Marked lower, which uses a different polymer blend and mounting layout.