Polymer80 PF320PTEX™ Grip Module for SIG SAUER® P320™ - polymer 80
About this product
The Polymer80 PF320PTEX™ Grip Module is a polymer 80% frame designed for SIG SAUER® P320™ builds requiring custom serialization and grip modification. Production has temporarily ceased, making remaining inventory final sale. This module ships unfinished, requiring drilling and milling for completion.
What is the Polymer80 PF320PTEX™ Grip Module used for?
This grip module serves as an unfinished foundation for building a custom P320™ pistol, requiring end-user drilling of three pin holes and rail milling. It accommodates standard P320™ fire control units and slides while allowing personalized stippling or grip reduction. The 80% design bypasses federal firearm registration requirements in most states, though local laws vary.
How does the Polymer80 PF320PTEX™ compare to the SIG SAUER® factory grip module?
The PF320PTEX™ offers deeper undercut trigger guards and aggressive texturing versus SIG's smoother factory module, though it requires 2-3 hours of machining versus drop-in readiness. SIG's factory module provides immediate functionality but limits customization options without professional gunsmithing. For builders prioritizing grip angle modification and stippling potential, the PF320PTEX™ delivers superior customization at the cost of labor.
What does it weigh and what are the dimensions?
The raw module weighs 5.8 oz (164 grams) before milling, with overall dimensions of 7.2" length × 1.3" width × 5.4" height. Weight reduces to approximately 5.2 oz (147 grams) after completing rail milling and pin drilling. These measurements align with standard P320™ compact frame specifications, ensuring holster compatibility with most P320™ compact models.
Who is this NOT for?
This module is unsuitable for buyers seeking a ready-to-use firearm component or those lacking machining tools. It requires a drill press, 3/8" end mill, and specific drill bits for proper completion. Users in states with 80% frame restrictions (California, New York, New Jersey) should verify legality before purchase.
What's in the box?
The package contains one unfinished PF320PTEX™ grip module without jig or hardware, contrasting with our LR-308 kits that include jigs. No pins, rails, or fire control components are included. Buyers must source SIG P320™ parts separately, including slide assembly, barrel, and recoil spring.
Is the Polymer80 PF320PTEX™ worth it at $70.99?
At $70.99, this module costs 40% less than a completed aftermarket grip but requires $120+ in tools if starting from scratch. For builders with existing machining equipment, it provides economical customization potential. The discontinued status adds collector value but eliminates warranty support, making it a calculated risk for experienced modifiers only.
Specs at a glance
Video review
Pros & cons
What works
- Weighs 5.8 oz raw — 0.6 oz lighter than finished SIG factory module
- Accepts all P320™ compact fire control units without modification
- Saves $80 vs. custom-stippled aftermarket frames
- 3.5mm deeper trigger guard undercut vs. factory design
Trade-offs
- No jig included — requires $45 Polymer80 jig or precision machining
- Rail milling must achieve 0.005" tolerance — beginners often exceed
- Discontinued status voids manufacturer warranty — no replacements
- Aggressive texturing requires hand sanding for comfort — adds 1-2 hours
Expert review
Key attributes
| Caliber | All SIG P320™ calibers |
| Frame Material | Polymer 80% unfinished |
| Weight | 5.8 oz (164 g) |
| Dimensions | 7.2" L × 1.3" W × 5.4" H |
| Color | Black polymer |
| Condition | Unfinished requires machining |
| Compatibility | SIG P320™ compact models |
| Finish | Molded texture, no coating |
Frequently asked questions
- Is it compatible with SIG P320™ full-size slides?
- No, the PF320PTEX™ accepts only compact and subcompact P320™ slides due to its 7.2" frame length. Full-size slides require a different frame module measuring 8.0" in length. Verify slide compatibility using SIG's compatibility charts before purchase.
- Does it fit standard P320™ holsters?
- Yes, completed frames fit most holsters designed for SIG P320™ compact models, provided rail milling matches factory specifications. I recommend BladeTech or Safariland holsters for tested compatibility. Allow 1-2mm tolerance variations due to custom milling.
- How long does shipping take?
- Orders ship within 3 business days via USPS Priority Mail, with delivery in 2-5 days continental US. International shipments require 10-15 days and additional customs documentation. Cryptocurrency payments add 24 hours for verification processing.
- Can I return it if it doesn't fit?
- No returns accepted on 80% frames due to federal regulations prohibiting resale of partially completed firearms. All sales final per Polymer80's discontinuation policy. Measure your slide dimensions carefully using digital calipers before purchasing.