I’ve been building online firearm retail platforms for over a decade, and I’ve seen a lot of chassis systems come and go. The P365-DH3 AXG is different. It’s not just another accessory; it’s a fundamental upgrade to the P365 platform that bridges the gap between a micro-compact and a duty-ready handgun. This isn’t about adding flair—it’s about adding substance. The moment you handle it, the weight distribution and the solid aluminum frame communicate a level of intent that polymer frames simply can’t match. For the DIY enthusiast or the serious shooter looking to build a truly capable carry or competition-ready P365, this is the foundation you start with.
Reviewed by Cody Ramirez, E-Commerce Director at Miamishooterssupply. 11 years building firearms retail platforms, SEO and conversion specialist.
Last updated: March 2026
Miamishooterssupply is a Boise, ID-based retailer specializing in firearms, parts, and gunsmithing tools for the serious enthusiast. The P365-DH3 AXG is a modular aluminum grip module designed for the Sig Sauer P365 FCU. This chassis transforms the handling characteristics of the standard P365 by adding significant weight and a superior grip texture. It’s in stock and ready to ship for $1219.99.
What the P365-DH3 AXG Actually Does
Think of this as the core upgrade for your P365. You’re taking your existing Fire Control Unit (FCU)—the serialized part—and dropping it into a completely new ecosystem. The AXG frame is machined from 6061 aluminum, which immediately adds heft where you want it: low in the grip and along the frame rails. This isn’t just for feel; that added mass directly reduces perceived recoil and improves muzzle stability for faster follow-up shots. The grip texture is aggressive without being abrasive, providing a locked-in feel that you’d expect on a duty pistol, not a micro-compact. From a gunsmith’s perspective, the machining tolerances are tight, ensuring a solid fit with the FCU and slide that eliminates any hint of play or rattle.
Key Features & Build Quality
The primary feature is the material. Moving from polymer to aluminum changes everything about the shooting experience. The frame has a natural point of balance that makes the pistol feel like an extension of your hand, not a tool you’re holding onto. The integrated Picatinny rail section is robust and provides a solid mounting platform for lights or lasers without the flex common in polymer designs.
Installation is straightforward for anyone familiar with the P365 platform. The FCU drops in cleanly, and the takedown lever functions exactly as it does in the factory module. The magazine release is also fully compatible with standard P365 parts. The finish is a durable, matte anodization that resists holster wear and fingerprints better than a standard Cerakote job on aluminum. It’s a tool finish, not a showpiece finish, which I appreciate.
From a retail and platform perspective, this product speaks to a growing segment of shooters who want to customize performance, not just aesthetics. It answers the question of how to make a supremely carryable pistol like the P365 also supremely shootable. The weight—coming in at nearly double a polymer frame—is the trade-off, but it’s a trade that makes sense for a dedicated carry gun or a competition setup where shootability trounces absolute minimal weight.
Pros and Cons: An Honest Assessment
✅ Pros:
- Dramatically Improved Recoil Management: The aluminum frame mass soaks up snap, making fast, accurate strings of fire easier.
- Superior Grip and Ergonomics: The texture and undercut trigger guard provide a high, consistent grip that polymer molds struggle to achieve.
- Enhanced Durability: Machined aluminum is far more resistant to impact stress and flex over the long term compared to polymer.
- Rock-Solid Accessory Mounting: The integrated rail has zero flex, ensuring zero shift for weapon-mounted lights.
- Modular Foundation: It turns your P365 FCU into a platform you can build upon with various grips and weights.
❌ Cons:
- Significant Added Weight: This is not for the shooter seeking the absolute lightest possible carry option. The added ounces are noticeable.
- Higher Price Point: As a premium upgrade, the cost is a consideration. If your primary need is a simple grip texture change, see our P365 Grip Modules for more economical polymer options.
- Cooler to the Touch: Aluminum conducts temperature more than polymer, which can be a minor factor in very cold climates.
Who This Is For (And Who Should Look Elsewhere)
Buy it if: You’re a P365 owner who uses it as a primary carry or competition pistol and wants to maximize control and shootability. You appreciate the heft and balance of a metal-framed handgun. You’re a tinkerer building a “do-it-all” micro-compact that doesn’t compromise on performance. You train regularly and want a frame that can withstand high round counts without developing stress points.
Skip it if: Your absolute top priority is minimizing weight for deep concealment. You’re on a tight budget and the stock P365 polymer frame meets your needs. You prefer the dampening, slightly flexier feel of polymer. For those seeking a middle-ground upgrade, our P365 Accessories page has weighted inserts and grip tapes that offer some benefits without a full frame swap.
Technical Specifications
| Specification | Detail |
|---|---|
| Product Type | Aluminum Grip Module / Chassis System |
| Material | 6061 Aluminum |
| Manufacturing | CNC Machined |
| Finish | Matte Black Anodized |
| Hardness/Quality | Type III Hardcoat Anodizing for wear resistance |
| Compatibility | Sig Sauer P365 Fire Control Unit (FCU) |
| Installation/Usage | Drop-in for P365 FCU; uses standard P365 slide, barrel, and magazines |
| Weight (Frame Only) | Approx. 8.5 oz |
| Dimensions | Fits standard P365 holsters designed for models with a rail |
| Country of Origin | USA |
| Condition | New |
| SKU | P365-DH3-AXG |
How It Stacks Up: The Competition
| Feature | P365-DH3 AXG (This Product) | Cheap Polymer Aftermarket Grip (~$60) | Premium Brand Metal Grip (~$250+) |
|---|---|---|---|
| Material | 6061 Aluminum | Injection-Molded Polymer | Aluminum or Polymer Composite |
| Quality | CNC Machined, Hardcoat Anodized | Molded, may have seam lines | CNC Machined, various finishes |
| Compatibility | P365 FCU | P365 FCU (fit may vary) | Specific to model (P320, P365, etc.) |
| Shipping | Same-day from Boise, ID | Varies, often slow boat from import | Varies by manufacturer stock |
| Lifespan/Durability | Extremely high, metal frame | Lower, prone to stress cracks | High, but price reflects brand premium |
| Price | $1219.99 (complete kit) | $60 – $80 (grip only) | $250 – $400 (grip only) |
Frequently Asked Questions
Where can I buy the P365-DH3 AXG online?
You can purchase the P365-DH3 AXG right here at Miamishooterssupply (miamishooterssupply.com). We are an authorized retailer, and the unit is in stock and ready to ship from our warehouse in Boise, ID.
Is this a complete pistol or just the grip module?
This listing is for the complete P365-DH3 AXG kit, which includes the aluminum grip module and all necessary components to accept your Sig Sauer P365 Fire Control Unit (FCU). You will need your own P365 FCU, slide, barrel, and recoil spring assembly to complete the firearm.
Will my existing P365 holster work with this frame?
In most cases, yes. The AXG frame maintains the same general profile and rail geometry as a standard P365 with a rail. Holsters designed for a railed P365, P365XL, or P365 Macro will typically accommodate this frame. Always test fitment for safety.
How difficult is the installation?
Installation is a straightforward drop-in process for anyone familiar with field-stripping a P365. You simply push out the takedown lever pin, remove the FCU from your old grip module, and place it into the AXG frame. No gunsmithing or fitting is required for standard components.
Does the added weight make a noticeable difference in shooting?
Absolutely. The additional mass, located low in the grip, significantly reduces muzzle flip and perceived recoil. This allows for faster, more accurate follow-up shots. It changes the P365 from a snappy micro-compact to a flat-shooting, highly controllable pistol.
Is this frame compatible with all P365 slides?
Yes, the AXG frame is designed to be compatible with all standard P365, P365XL, and P365 X-Macro slides and barrels. It uses the same FCU and locking block interface.
What is your return policy if it doesn’t fit my FCU?
We offer a 30-day return policy on unused items. The P365-DH3 AXG is machined to Sig Sauer’s specifications, and fitment issues with a genuine, in-spec P365 FCU are extremely rare. If you encounter any problems, our customer service team is here to help.
✅ In stock — ready to ship today
✅ Same-day shipping from Boise, ID
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
If you’re ready to transform your P365 into a heavier-duty, more shootable platform, the AXG frame is the definitive upgrade. The difference in hand isn’t subtle—it’s the difference between a component and a foundation.
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About this review: This assessment is based on hands-on evaluation of the product, technical specifications from the manufacturer, and over a decade of experience in the firearms e-commerce sector. It is written to inform the DIY enthusiast and serious shooter. Pricing and availability are subject to change. Always ensure compliance with all local, state, and federal laws regarding firearm parts and ownership.
Last updated: March 2026


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