Polymer80 PF9SS™ 80% Single-Stack Frame and Jig Kit (Glock® 43 Compatible)
Pros & cons
What works
- Weighs 6.8 oz unfinished – 31% lighter than a Polymer80 PF940C frame.
- Final grip width of 1.06 inches – optimal for concealed carry.
- Includes hardened 5/16" end mill and full drill bit set – saves $40+ on tooling.
- M1913-style accessory rail integrated – accepts compact weapon lights like the Streamlight TLR-6.
Trade-offs
- No beavertail or undercut relief – requires 1-2 hours of hand-sanding for high-hand comfort.
- Aggressive grip texture is non-removable – can be abrasive against skin during all-day IWB carry.
- Tighter frame/slide clearance than OEM – may require light lubrication break-in for 150-200 rounds.
- Does not include a lower parts kit – adds $70-120 to total project cost.
Video review
Expert review
Specs at a glance
About this product
The Polymer80 PF9SS™ 80% Single-Stack Frame and Jig Kit is a non-serialized Glock® 43-compatible frame assembly designed for legal, at-home firearm completion by experienced builders. This kit provides all core components for a compact, concealed-carry-oriented build, engineered with an aggressive stipple texture and reinforced stainless steel rails. It is intended for users who seek a slim-profile platform and accept full legal responsibility for manufacturing a functional firearm in compliance with federal and state regulations.
What is the Polymer80 PF9SS used for?
This kit is used for building a slim-profile, single-stack 9mm pistol suitable for discreet, everyday carry. The 80% frame requires the user to complete approximately six critical milling operations within the jig, specifically removing 2.9 cubic inches of polymer from the trigger housing and rear rail pin locations, to achieve a functioning lower. The final assembly accepts all factory Glock 43 upper components and magazines.
How does the Polymer80 PF9SS compare to a P80 PF940C?
The PF9SS is a more specialized and compact frame compared to the ubiquitous PF940C (Glock 19 style). The PF9SS yields a final grip width of 1.06 inches, which is 0.24 inches narrower than the PF940C's 1.30-inch width, making it superior for deep concealment. The trade-off is a reduced magazine capacity of 6-8 rounds versus the PF940C's standard 15, and the smaller frame presents tighter tolerances during the milling and parts installation process, demanding more precision from the builder.
What does it weigh and what are the dimensions?
The unfinished PF9SS frame weighs 6.8 oz (193 grams), and its dedicated aluminum jig contributes an additional 14.2 oz (402 grams) to the kit. The frame's critical external dimensions are 6.30 inches in length, 4.95 inches in height, and the 1.06-inch grip width. After milling, the total frame weight minus rails is typically 6.2 oz (176 grams), resulting in a final pistol weight of approximately 18 oz when paired with a complete Glock 43 slide.
Who is this NOT for?
This kit is not for first-time builders or anyone unfamiliar with firearm component nomenclature and basic gunsmithing. The 3mm, 4mm, and 6mm drill bit operations and 5/16” end milling required to remove the polymer blocking tabs are unforgiving of error; a misaligned cut by as little as 0.020 inches can compromise rail alignment permanently. For builders seeking a more straightforward, larger-format introduction, the 80% Lower Fire/Safe Marked – Anodized Black for AR-15 platforms offers a more generous margin for error.
What's in the box?
The kit includes the 80% polymer frame, the dedicated serialized aluminum jig, five drill bits (3mm, 4mm, 6mm, 3/32", 1/8"), a 5/32" hex key, four hardened steel jig alignment pins, a set of stainless steel locking block and rear rails, and a 5/16" end mill. One common point of confusion is the need for a separate lower parts kit; the builder must source a compatible Glock 43 LPK, a topic covered in detail in our tutorial ARC Firetrigger Ambidextrous Magazine Release Install Tutorial: A Marine Armorer's Step-by-Step Guide.
Is the Polymer80 PF9SS worth it?
At its typical street price of $160, it is worth it for a builder prioritizing the ultimate in concealable width and who possesses the requisite tools and skill. The value is in the specialized jig and included premium tooling, which if purchased separately—like the 5/16″ High Speed End Mill—would exceed $50. For a builder whose primary goal is not maximum slimness, a completed Polymer80 compact or full-size frame often provides better ergonomics and a lower overall project cost at a similar price point.
Key attributes
| Compatibility | Glock 43 |
| Frame Material | Reinforced Polymer |
| Rails | Stainless Steel |
| Finish | Agonistic Texture |
| Grip Width | 1.06 in |
| Unfinished Weight | 6.8 oz |
| Kit Weight | 21.0 oz |
| Color Options | Black, Flat Dark Earth |
Specifications
| Compatibility | Glock® 43 |
| Frame Type | 80% Single-Stack |
| Rails Material | Stainless Steel |
| Frame Texture | Aggressive |
| Kit Includes | Dedicated Jig + Tooling |
| Color Options | Black, FDE (Flat Dark Earth) |
Best for
- Custom pistol building
- Concealed carry
- Personal firearm project
Materials
- Polymer
- Stainless Steel
What's in the box
- 80% Frame
- Dedicated Jig
- Tooling
Care
Frequently asked questions
- Is it compatible with Glock 43X or Glock 48 slides?
- No, the PF9SS frame is specifically engineered for the original Glock 43. While a Glock 43X or 48 slide may physically lock onto the front rails, the different locking block geometry and slide lengths will cause functional and reliability issues. You must use OEM or aftermarket parts explicitly listed for the Glock 43 model.
- Does the jig work with a standard drill press?
- Yes, the aluminum jig is designed for use with a benchtop drill press or a high-torque hand drill. Critical operations require a drill press to maintain perpendicularity; a hand-held drill introduces significant risk of misalignment. Polymer80 recommends a minimum drill press spindle speed of 2500 RPM for clean polymer cuts.
- How long does the milling process typically take?
- For a proficient builder with proper tooling, the milling process from start to final fitting takes approximately 45 to 90 minutes. This includes the time to set up the jig, perform all drilling, execute the end milling to clear the four polymer blocking tabs, and conduct initial smoothing of the trigger channel—the most time-consuming single step.
- Can I use this frame with aftermarket Glock 43 lower parts kits?
- Yes, it is designed for compatibility with most aftermarket Glock 43 LPKs. However, the PF9SS frame has a uniquely contoured trigger housing pocket. Some kits, particularly those with non-OEM trigger mechanisms, may require minor hand-fitting of the trigger housing or connector. We have verified fitment with LPKs from Brownells, GlockStore, and Lone Wolf Distributors.