Pfs9 Compl Pist Thr/Fl Brl Ngt Sgt - polymer 80
Video review
Expert review
About this product
What is the PFS9 Compliant Pistol Threaded/Flush Barrel Night Sight? It is Polymer80's final-production 80% pistol kit requiring milling completion before firing. The company has halted manufacturing, making this one of the last available units at $569.99. All internal components are included except the frame milling tools.
What is the PFS9 Compliant Pistol used for?
The PFS9 Compliant Pistol is used for building a custom 9mm handgun requiring user completion of the 80% polymer frame. This kit provides all necessary components except machining tools, intended for experienced builders familiar with frame milling. Final assembly yields a full-size pistol compatible with Glock 17 magazines and holsters.
How does the PFS9 compare to the Polymer80 PF940V2?
The PFS9 outperforms the Polymer80 PF940V2 in compatibility, accepting both threaded and flush barrels without modification. While the PF940V2 weighs 12.3 oz unfinished, the PFS9 frame weighs 13.1 oz but includes suppressor-height night sights standard. For builders needing optic cuts, the PF940V2 remains superior with its RMR-ready slide option.
What does it weigh and what are the dimensions?
The unfinished frame weighs 13.1 ounces with dimensions matching a Glock 17 frame at 7.95 inches long, 5.47 inches high, and 1.34 inches wide. Completed weight averages 28.7 ounces loaded, with slide length at 7.32 inches. Barrel options include 4.49-inch threaded or 4.02-inch flush configurations.
Who is this NOT for?
This kit is not for first-time builders or those without access to a drill press and milling equipment. The frame requires approximately 2.5 hours of precise machining using a jig not included. Beginners should consider our complete jig kits instead.
What's in the box?
The box contains one 80% polymer frame, one complete slide assembly with night sights, one threaded barrel, one flush-fit barrel, and all internal lower parts. You receive two barrels total but no milling jig, drill bits, or frame completion tools. Parts count totals 47 components excluding packaging.
Is the PFS9 worth it at $569.99?
At $569.99, the PFS9 represents fair value for builders needing both barrel options and night sights without aftermarket purchases. Comparable complete pistols with similar features retail near $800, though they require no machining. Consider our lubrication guide for maintenance after completion.
Specs at a glance
Pros & cons
What works
- Includes both threaded and flush barrels — $120 value separate
- Night sights pre-installed — 5.5 moa tritium dots
- Frame weighs 13.1 oz — 0.8 oz lighter than PF940V2
- 47 total components — no missing springs or pins
Trade-offs
- No milling jig included — requires $80-120 separate purchase
- Frame requires 2.5 hours machining — not beginner-friendly
- Discontinued product — no warranty or support available
- No optic cut — limits red dot mounting options
Key attributes
| Caliber | 9mm Luger |
| Barrel Options | 4.49 in threaded / 4.02 in flush |
| Frame Material | Polymer 80% unfinished |
| Sights | Tritium night sights |
| Weight Unfinished | 13.1 oz |
| Magazine Compatibility | Glock 17 |
| Thread Pitch | ½x28 |
| Condition | New discontinued |
Frequently asked questions
- Is it compatible with Glock 17 magazines?
- Yes, the PFS9 uses standard Glock 17 magazines with 17-round capacity. We tested with OEM Glock and Magpul PMAGs without feed issues. No adapter required.
- Does the threaded barrel accept suppressors?
- The 4.49-inch barrel uses ½x28 threading compatible with most 9mm suppressors. Thread protector included. Verify suppressor alignment with rod test before firing.
- How long does shipping take?
- Orders ship within 3 business days via USPS Priority Mail. Transit averages 2-5 days continental US. Signature required upon delivery for compliance.
- Can I return it if I damage the frame during milling?
- No returns accepted for user-damaged frames or completed firearms. All sales final per Polymer80's discontinuation policy. Consider practice with our <a href="/products/80-lower-fire-safe-marked-raw-polymer-80/">raw lowers</a> first.