
Availability: In Stock
The Tyrant CNC Hellcat magazine extension adds 3 rounds of 9mm capacity to your Springfield Hellcat or Hellcat Pro, giving you more ammunition on tap without the bulk of a larger frame gun. Built from 7000-series aluminum and precision CNC machined, this extension is finished with a bead-blast and hardcoat anodized coat that stands up to daily carry and heavy use. It works with your existing OEM magazine spring, so there's no guesswork about compatibility—just install and shoot.
What makes this extension different is Tyrant CNC's NoBak springer plunger technology. Installation is straightforward, requires no special tools or gunsmith work, and the extension stays locked in place whether you're running drills, competing, or carrying. The design is clean and purposeful, matching the minimalist profile of the Hellcat line without adding unnecessary material or complexity.
Whether you're a competitive shooter looking to trim reload cycles, a hunter who wants fewer magazine swaps in the field, or someone carrying for self-defense, three extra rounds can make a real difference in how often you need to reload. And because installation is truly tool-free, upgrading is something you can handle in minutes, not at a gunsmith bench.
| Designed For | Springfield Hellcat, Hellcat Pro |
| Capacity Increase | +3 rounds (9mm) |
| Material | 7000-series aluminum |
| Finish | Bead-blasted, hardcoat anodized |
| Extension Height | 22.6 mm |
| Extension Weight | 36 grams |
| Assembled Magazine Height | 124 mm |
| Assembled Magazine Weight | 108 grams |
| Installation | Tool-free, no modifications required |
Yes. This extension is designed for both the Hellcat and Hellcat Pro. It does not fit 10-round magazines.
No. The extension uses your existing OEM magazine spring, and Tyrant CNC's NoBak technology means installation requires no special tools or gunsmith work—just a few minutes of your time.
The NoBak plunger is Tyrant CNC's design that keeps the extension securely locked in place during use and handling—dropped, thrown, or under heavy firing strings—while still allowing tool-free removal when you need to swap magazines.
The extension itself weighs 36 grams. Once installed on your magazine, the assembled magazine weighs 108 grams and stands 124 mm tall, adding minimal footprint for three extra rounds.

SKU: 144600235 • Width: 4in • Height: 1in • Depth: 4.5in • Weight: 0.1oz





Availability: In Stock
The Tyrant CNC Hellcat magazine extension adds 3 rounds of 9mm capacity to your Springfield Hellcat or Hellcat Pro, giving you more ammunition on tap without the bulk of a larger frame gun. Built from 7000-series aluminum and precision CNC machined, this extension is finished with a bead-blast and hardcoat anodized coat that stands up to daily carry and heavy use. It works with your existing OEM magazine spring, so there's no guesswork about compatibility—just install and shoot.
What makes this extension different is Tyrant CNC's NoBak springer plunger technology. Installation is straightforward, requires no special tools or gunsmith work, and the extension stays locked in place whether you're running drills, competing, or carrying. The design is clean and purposeful, matching the minimalist profile of the Hellcat line without adding unnecessary material or complexity.
Whether you're a competitive shooter looking to trim reload cycles, a hunter who wants fewer magazine swaps in the field, or someone carrying for self-defense, three extra rounds can make a real difference in how often you need to reload. And because installation is truly tool-free, upgrading is something you can handle in minutes, not at a gunsmith bench.
| Designed For | Springfield Hellcat, Hellcat Pro |
| Capacity Increase | +3 rounds (9mm) |
| Material | 7000-series aluminum |
| Finish | Bead-blasted, hardcoat anodized |
| Extension Height | 22.6 mm |
| Extension Weight | 36 grams |
| Assembled Magazine Height | 124 mm |
| Assembled Magazine Weight | 108 grams |
| Installation | Tool-free, no modifications required |
Yes. This extension is designed for both the Hellcat and Hellcat Pro. It does not fit 10-round magazines.
No. The extension uses your existing OEM magazine spring, and Tyrant CNC's NoBak technology means installation requires no special tools or gunsmith work—just a few minutes of your time.
The NoBak plunger is Tyrant CNC's design that keeps the extension securely locked in place during use and handling—dropped, thrown, or under heavy firing strings—while still allowing tool-free removal when you need to swap magazines.
The extension itself weighs 36 grams. Once installed on your magazine, the assembled magazine weighs 108 grams and stands 124 mm tall, adding minimal footprint for three extra rounds.
SKU: 144600235 • Width: 4in • Height: 1in • Depth: 4.5in • Weight: 0.1oz
