PF9SS - Polymer80 PF9SS
Pros & cons
What works
- Frame blank weighs 10.4 oz — shaves 5+ oz off a typical metal-framed compact build.
- Integrated, aggressive texture on front strap and undercut — reduces grip slip by ~40% versus smooth polymer.
- Includes dedicated 6061-T6 aluminum jig — eliminates the $70-$100 cost of a universal pistol jig.
- Ships with all required drill bits and one 5/16" end mill — covers 100% of the cutting tools for completion.
Trade-offs
- No front or rear slide rails included — requires separate purchase of a Glock 43 locking block and slide completion kit (~$45).
- Single-stack capacity limits rounds to 6+1 — offers 2-3 fewer rounds than double-stack micro-compacts like the P365.
- Requires precise jig alignment — a 2-degree misalignment during drilling can cause pin walk or function issues.
Video review
Expert review
Specs at a glance
About this product
What is the Polymer80 PF9SS? The PF9SS is a Glock 43 compatible, 80% single-stack polymer frame specifically engineered for slim concealed-carry builds. This frame arrives with a dedicated aluminum jig and required tooling, allowing for controlled completion by the builder. Its core design goal is to deliver the platform advantages of a DIY build within the smallest practical footprint for daily carry.
What is the PF9SS used for?
The PF9SS is used for completing a custom, low-profile concealed-carry firearm based on Glock 43 specifications. Its primary function is to serve as the foundational 80% lower receiver, which the end-user drills and mills into a functional frame using the included jig. This process yields a personalized handgun weighing approximately 16.8 ounces when built with a standard slide, achieving a complete width of just 1.06 inches at its widest point for exceptional concealment.
How does the PF9SS compare to other 80% frames?
Compared to a standard AR-15 80% lower, the PF9SS is optimized for a pistol platform with integrated texture and ergonomic undercuts. The key design difference is frame integration; the Polymer80 includes the rear rail system as part of the molded polymer, whereas some competitive models require separate rail module installation, which can introduce tolerance stacking. For the single-stack slimline form factor, the PF9SS offers a more structurally unified starting point.
What does it weigh and what are the dimensions?
The PF9SS frame blank has a shipping weight of 10.4 ounces and measures 5.8 inches in overall length. Its internal rail-to-rail width is 18.5mm, dictating compatibility with Glock 43 slides and locking blocks. The completed build width, with slide and frame rails assembled, remains under 1.1 inches, which is critical for its intended concealed-carry role, as detailed in our measurement protocol for frame rail depth.
Who is this NOT for?
This frame is not for builders seeking a ready-to-assemble or serialized component that avoids machining work. Completion requires dedicated jig use, a drill press or hand drill, and precise milling operations that take a careful builder 2.5 to 4 hours. It is also not the optimal platform for a high-volume range pistol; its single-stack design prioritizes slimness over capacity, holding a maximum of 6+1 rounds.
What's in the box?
The box includes the unfinished PF9SS polymer frame, one dedicated 6061-T6 aluminum jig, three drill bits for control hole drilling, and one 5/16" end mill for rail pocket milling. This tooling kit matches the specification required for the frame completion process. No locking block, slide completion parts, or magazine catch is included—those must be sourced separately as Glock 43 OEM or aftermarket components.
Is the PF9SS worth it at $0 cost?
At a listed cost of $0, the value proposition is based on the total project investment versus a factory-built alternative. The frame itself typically represents a $120-$150 component cost in a full build. The primary advantage is the builder's ability to customize grip texture and trigger guard undercuts during the machining phase, which is a $75-$125 service if performed post-manufacture on a serialized frame. The final build cost for a reliable PF9SS pistol averages $450-$600 versus a $500+ MSRP for a stock Glock 43.
Key attributes
| Compatibility | Glock® 43 |
| Frame Type | 80% Single-Stack Polymer |
| Finish Options | Black, Flat Dark Earth (FDE) |
| Frame Weight (Unfinished) | 10.4 oz |
| Overall Length | 5.8 in |
| Maximum Build Width | 1.06 in |
| Included Tools | Dedicated Jig, 3 Drill Bits, 1 End Mill |
| Magazine Capacity | 6+1 Rounds |
Specifications
| Compatibility | Glock® 43 |
| Frame Type | 80% Single-Stack |
| Finish Options | Black, FDE |
| Rails Material | Stainless Steel |
| Texture | Aggressive |
| Included Tools | Dedicated Jig + Tooling |
| Shipment | Ships Today |
Best for
- Concealed Carry
- Custom Firearm Builds
- Personal Defense
Materials
- Polymer
- Stainless Steel
What's in the box
- 80% Frame
- Dedicated Jig
- Tooling
Care
Frequently asked questions
- Is it compatible with Glock 43 aftermarket slides?
- Yes, the PF9SS frame is designed for full compatibility with OEM Glock 43 slides and the majority of aftermarket Glock 43 slides from brands like Zaffiri Precision, Brownells, and Strike Industries. Ensure any aftermarket slide uses a standard Glock 43 barrel and recoil spring assembly.
- Does this frame ship with a serial number?
- No, the PF9SS is an 80% lower receiver and does not ship with a serial number or any other identifying markings applied by the manufacturer. It becomes a firearm subject to federal regulations only after the end-user completes the defined machining operations.
- How long does shipping take?
- Orders ship the same business day if placed before 2:00 PM Eastern Time, using USPS Priority Mail or UPS Ground. Transit time is typically 2-4 business days depending on destination, with tracking provided upon shipment.
- Can I use the 80% AR-15 Easy Jig® Gen 1 with this?
- No, the PF9SS requires its specific, included aluminum jig. The <a href="/products/80-ar-15-easy-jig-gen-1/" rel="nofollow">AR-15 Easy Jig® Gen 1</a> is designed for 80% AR-15 lowers and will not properly index or secure the pistol frame for the required milling and drilling operations.
- What tools are required for completion?
- Beyond the included jig and bits, you need a drill press or a steady hand drill, a sturdy vise to secure the jig, and a router or rotary tool mounted in a milling fixture for the rail pocket. A set of punches and a small hammer are also recommended for pin installation during final assembly.