Tyrant Cnc Magazine Extension +3 For Sig Sauer P365 X-Macro Aluminum

The Tyrant CNC Magazine Extension +3 for Sig Sauer P365 X-Macro is a compact aluminum basepad designed to boost your carry capacity without the bulk. This extension adds three rounds of 9mm to your P365 X-Macro 17-round magazine, bringing total capacity to 20 rounds plus one in the chamber. Built from 6061 aerospace-grade aluminum and engineered with Tyrant CNC's proven "NoBak" retention spring technology, it installs tool-free in seconds and functions flawlessly without requiring a power spring—a real advantage if you're looking for straightforward, reliable performance.

If you carry a Sig P365 X-Macro for personal defense or hit the range regularly, this extension strikes the balance between added firepower and practical concealment. The low-profile design is dimensioned to match your P365 frame geometry, minimizing printing when you're in a quality holster. Installation is genuinely quick: just slide the extension onto your magazine basepad and you're done. Removal is equally simple—press the plunger and slide it off. No tools, no fuss, no springs to fiddle with.

One note worth knowing: depending on when your OEM Sig magazine was manufactured, the spring inside may vary. Some earlier production springs may not lock the slide back on the final round when paired with this extension or other third-party basepads. If you run into that issue, a replacement spring is a straightforward fix. The extension works with most magwells and is compatible with California-compliant magazine versions, but it does not fit lower-capacity P365 models with inward-folding flanges.

Key Features

• Adds 3 rounds of 9mm capacity to P365 X-Macro 17-round magazines
• CNC machined from 6061 aerospace-grade aluminum for durability
• Tool-free installation and removal in seconds
• "NoBak" retention technology eliminates need for a power spring
• Low-profile design minimizes printing under clothing
• Works with most magwells and California-compliant magazines

Specifications

Frequently Asked Questions

Will this extension fit my Sig P365 or other P365 models?

No—this extension is designed specifically for the P365 X-Macro 17-round magazine. It will not fit lower-capacity P365 magazines that have inward-folding flanges. It is compatible with the X-Macro only.

Do I need a power spring for this extension to work?

No. The Tyrant CNC extension uses the "NoBak" retention technology and does not require a power spring to function reliably. This simplifies the design and installation process.

How long does installation take, and do I need tools?

Installation is completely tool-free and takes 10 seconds or less. You simply slide the extension onto your magazine basepad. Removal is just as easy—press the retention plunger and slide it off.

Will this extension work with magwells and holsters?

The extension is designed to work with most magwells and has a low-profile shape to minimize printing under clothing. Its dimensions are matched to the P365 frame geometry. Compatibility with specific holsters depends on individual holster design, so verify your holster can accommodate the slightly longer magazine profile.