StrikePoint Sig Sauer Resource Center

Your complete guide to Sig Sauer P-Series, X-Series, Macro line, and beyond.

Sig Sauer pistols have earned a reputation for precision engineering, exceptional ergonomics, and duty-grade durability. From legendary classics like the P226 and P229 to the modern P320 and P365 series, Sig pistols are carried by elite military units, law enforcement agencies, concealed carriers, and competition shooters all over the world.

At StrikePoint Gunsmithing, our goal is to build the most accurate, useful, and gunsmith-backed Sig Sauer resource hub online—a place where owners can learn the history, the mechanical differences, the hidden variations, and the upgrade paths of one of the most iconic firearms manufacturers in the world.

This page serves as the foundation for that long-term project.

What You’ll Find in the StrikePoint Sig Sauer Series

Over the coming months, we will publish a deep, structured library of articles covering the major Sig Sauer platforms, with a special emphasis on the P-Series, the P320 system, and the P365/X-Macro series.

Content categories will include:

Gunsmithing Insights & Maintenance

Practical, bench-tested gunsmithing perspectives for the Sig platforms you actually carry and shoot.

• How to maintain your Sig for long-term reliability
• Common issues and real fixes for P320, P365, P226, P229, and more
• How to identify and replace worn springs, extractor components, and sear assemblies
• Best practices for lubrication and cleaning
• Detailed teardown and inspection notes for each major model family

Sig Sauer pistols have unique mechanical characteristics compared to Glock, CZ, or HK. These articles will reflect a true armorer/gunsmith perspective, based on real service pistols that come across the bench.

Model-by-Model Guides

StrikePoint’s Sig Sauer database will include complete, detailed guides for the most important platforms.

P-Series (Classic DA/SA)

• P226
• P229
• P228 (M11)
• P220
• P239
• P224 / P225
• Frame variations, folded vs. milled slides, German vs U.S. production

P320 Series

• P320 variations and configurations
• Fire control unit (FCU) differences and updates
• Grip (frame) modules and ergonomics
• Slide lengths, calibers, and compatibility
• X-Series and Legion models

P365 / X / XL / Macro Series

• P365 evolution timeline
• X-Macro series and real-world compatibility
• Slide/barrel interchange, holster fitment, and optic options
• Known issues (striker drag, broken firing pins, RSA updates)
• Recommended reliability-focused upgrades

Each model page will include specifications, compatibility notes, production variations, recommended upgrades, known weak points, and suggested maintenance intervals.

Parts, Generations & Hidden Variations

Unlike Glock, Sig Sauer does not use clear “generation” labels. Many important changes happen quietly, with:

• Unmarked internal revisions
• FCU updates and small-part geometry changes
• Slide machining differences
• Barrel hood and locking surface changes
• Extractor design revisions
• Trigger weight and spring updates
• German vs U.S. proof marks and QC variations

StrikePoint will catalog these differences in a structured, searchable format so you can understand exactly which Sig you have and what parts it really needs.

Compatibility Guides

One of the biggest challenges Sig owners face is compatibility. Expect detailed guides for:

• P365/P365X/P365XL/X-Macro slide & frame compatibility
• P320 Compact vs Carry vs Full vs X-Series grip and slide combinations
• P226/P229 magazine and part compatibility
• Extractor differences between slide generations
• Grip module options for P320 and P365 (SIG OEM and aftermarket)
• Optic cut compatibility (SIG ProCut, RMS-C, Holosun K, and others)
• Weapon lights and holster interoperability

Upgrades & Accessory Recommendations

From a gunsmith’s point of view—reliability and safety first, cosmetics second—we will evaluate:

• Triggers (Grayguns, Armory Craft, SIG OEM, and more)
• Sights (SIG X-Ray, tritium, fiber optics, competition sets)
• Recoil springs, guide rods, and small-part kits
• Enhanced locking inserts and upgraded parts for P-Series
• P320 & P365 grip modules (Wilson, Icarus, Mischief Machine, SIG OEM)
• Weapon lights (e.g., TLR-7 Sub, X300, PL-Mini series)
• Optic choices for ProCut and other optic-ready slides

Every recommendation is grounded in how the gun actually runs—not just how it looks in photos.

Customization & Performance Work

• Trigger refinement and smoothing for P-Series, P320, and P365
• Extractor and feed ramp tuning for reliability
• Optic cut services and mounting
• P320 FCU inspection, cleaning, and overhaul
• P365 and P320 recoil system tuning
• Cerakote, refinishing, and cosmetic work
• Accuracy testing and recommendations for improvement

Why StrikePoint’s Sig Sauer Guides Will Stand Apart

Most Sig Sauer information online is spread across forums, social media groups, and incomplete videos. There is no unified database for:

• P-Series frame variations and slide types
• German vs U.S. proof marks and production differences
• Slide and extractor changes over time
• Magazine and small-part variations
• P320 FCU evolution and updates
• P365 and X-Macro compatibility details

The StrikePoint Sig Sauer Resource Center is designed to change that. It will be:

• Gunsmith-backed – based on real work done on real pistols
• Technically accurate – focused on how the guns are built and function
• Fully documented – organized by model, platform, and part
• Accessible – written for both new shooters and experienced collectors

This series is built to be the reference Sig owners always wished existed.

Who These Sig Sauer Guides Are For

This resource center is for anyone who owns—or is thinking about owning—a Sig Sauer pistol, including:

• Concealed carriers (P365, P365X, XL, Macro)
• Duty and tactical users (P320, M17, M18)
• DA/SA enthusiasts (P226, P229, P220, P228, P239)
• First-time Sig Sauer buyers
• Collectors of German and legacy Sig pistols
• Competition shooters
• DIY upgrade and modification fans
• Anyone else needing a quick reference

Whether you need basics or deep mechanical knowledge, you will find practical, real-world information here.

Start Here: Core Sig Sauer Articles (Coming Soon)

As the Sig Sauer library grows, these cornerstone resources will be the best places to start:

• Sig Sauer P-Series Overview (P220, P226, P229, P228, P239)
• P320 Complete Buyer & Variations Guide
• P365 / X / XL / Macro Compatibility Guide
• German vs U.S. Sig Pistols: What’s the Difference?
• Sig Sauer Serial Number & Production Reference (Unofficial)
• Best Upgrades for P320 (Gunsmith’s Ranking)
• Best Upgrades for P365 (Reliability First)

Bookmark this page and check back frequently—new guides and compatibility tools will be added over time.

Sig Sauer Gunsmith Services at StrikePoint

For Sig owners in East Tennessee, StrikePoint Gunsmithing offers a full range of services, including:

• Sight installation and zeroing
• Trigger installation and tuning
• P320 FCU service and inspection
• P365 & P320 reliability and function work
• Extractor replacement and tuning
• Detail stripping, cleaning, and lubrication
• Optic installation and mounting
• Pre-carry inspections and function checks

If you’re in East Tennessee and want professional Sig Sauer work done, we’d be glad to help.

Contact StrikePoint Gunsmithing to schedule service, upgrades, or inspection.

Stay Updated on New Sig Sauer Content

As this Sig Sauer resource center grows, we’ll be adding:

• New model-specific guides
• Upgrade and accessory reviews
• Maintenance and troubleshooting articles
• Gunsmithing tips and bench insights

Sig Sauer as a Platform, StrikePoint as Your Resource

Sig Sauer firearms combine engineering excellence with modularity, ergonomics, and unmatched platform variety. Whether you’re running a classic hammer-fired P-Series pistol or a modern striker-fired P320 or P365, understanding the mechanical differences and upgrade paths helps you get the most from your firearm.

This is the beginning of the StrikePoint Sig Sauer Resource Center—and we’re glad you’re here.