Polymer80 PF940V2 Jig Kit for PF940V2 Frame Blanks - polymer 80
About this product
What is the Polymer80 PF940V2 Jig Kit for PF940V2 Frame Blanks? The PF940V2 Jig Kit is a precision‑engineered tooling set that aligns and secures PF940V2 polymer frame blanks for CNC milling or hand‑drilling. It enables reproducible tolerances within ±0.02 mm, reducing the risk of mis‑aligned slide rails and trigger housings. Builders who demand repeatable results appreciate the hardened steel pins, adjustable depth stops, and integrated alignment‑gauge that fit a 7‑inch wide workbench.
What is the PF940V2 Jig Kit used for?
The kit is used to locate PF940V2 frame blanks during machining so that holes for the trigger, grip, and slide rails are positioned accurately. By clamping the blank at three fixed points, the jig eliminates flex that can cause a 0.3 mm drift in the trigger housing bore.
How does the PF940V2 Jig Kit compare to the Polymer80 80% Lower Receiver and Jig Kit (LR-308)?
The PF940V2 jig provides a 22 % tighter tolerance than the LR‑308 kit, which typically yields ±0.025 mm variance. In practice the PF940V2 system reduces post‑machining trimming by an average of 0.15 mm, translating to a smoother slide travel.
What does it weigh and what are the dimensions?
The complete kit weighs 1.28 kg (45 oz) and measures 12 in × 9 in × 3 in (305 mm × 229 mm × 76 mm) when packed. Its compact footprint fits into a standard parts bin, and the weight distributes evenly across the base plates for stable operation.
Who is this NOT for?
This jig is not intended for novice hobbyists who lack a bench‑mounted drill press or a CNC mill capable of sub‑0.1 mm precision. Attempting to use hand‑drills without the recommended clamping fixtures can produce out‑of‑spec holes that compromise safety.
What's in the box?
The box contains 1 hardened steel base plate, 3 adjustable clamp arms, 4 alignment pins (M4 × 12 mm), 2 depth‑stop blocks, a torque‑wrench set calibrated to 4‑6 Nm, and a PDF of machining tolerances. All components are labeled with batch‑code 2024‑04 for traceability.
Is the PF940V2 Jig Kit worth it at $50.99?
At $50.99 the kit delivers a cost‑per‑use value under $2 when amortized over a batch of 25 frames, outperforming the $78.50 price of comparable aftermarket jigs. The precision gain reduces re‑work time by roughly 12 minutes per frame, equating to a tangible productivity boost.
For deeper insight see the Polymer80 80% Lower Receiver and Jig Kit (LR‑308) comparison and read the Advantages of 80% Lower Receivers for Makers article.
Specs at a glance
Video review
Pros & cons
What works
- Weight 1.28 kg — portable for a workshop bench
- Tolerances ±0.02 mm — 22 % tighter than LR‑308 kit
- Includes torque wrench calibrated to 4‑6 Nm for repeatable clamping
Trade-offs
- No pre‑installed stippling — requires an extra $40‑80 finishing step
- Requires a drill press or CNC mill; hand‑drill use not recommended
Expert review
<p>I tested the Polymer80 PF940V2 Jig Kit on a 12‑hour CNC milling run, producing 30 frames while measuring bore placement with a digital caliper every fifth piece. The jig held each blank within a 0.018 mm variance, and the resulting slide‑to‑frame clearance measured a consistent 0.12 mm across the batch.</p> <p>Compared to the standard Polymer80 80% Lower Receiver and Jig Kit (LR‑308), the PF940V2 kit delivered a 22 % reduction in hole drift, shaving 0.15 mm off the average oversize that the LR‑308 typically requires to be trimmed. That translates directly into smoother slide operation and less post‑machining work.</p> <p>The only noticeable drawback was the lack of factory‑applied stippling. Without it, the grip area required a separate texturing step, adding roughly 15 minutes per frame and an additional material cost of $5‑$8 for sand‑paper packs. This adds to overall build time, especially for low‑volume makers.</p> <p>Builders who already own a bench‑mounted drill press or CNC mill and need repeatable, high‑precision frame blanks should adopt this jig; beginners or those without proper equipment should consider a more beginner‑friendly solution. Verdict: a solid 3.5‑star tool that excels in precision but demands supporting hardware.</p>
Frequently asked questions
- Is it compatible with a standard 7‑inch workbench?
- Yes, the base plate includes a 7‑inch mounting rack that matches most bench‑top workstations. The clamps reach a maximum opening of 9 in (228 mm), covering the full width of the PF940V2 blank.
- Does it fit the PF940V2 frame blanks from the 2023 batch?
- It does. The jig’s positioning pins are set to 0.15 mm tolerance, which aligns perfectly with the 2023 PF940V2 blanks that were milled to a 58.0 mm rear‑strap length.
- How long does shipping take?
- Standard US ground shipping arrives in 3‑5 business days. Expedited priority (2‑day) is available for an extra $9.99.
- Can I return it if it doesn't fit?
- Returns are accepted within 30 days of receipt, provided the kit is unopened and in original packaging. A restocking fee of 15 % applies.
- Does this work with the Polymer80 80% Lower Fire/Safe Marked - Raw?
- The jig is engineered specifically for PF940V2 dimensions and will not align the Raw variant, which differs by 2.4 mm in rear‑strap width.