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P320 X MAGAZINE EXTENSION - PLUS 5 - HENNING GROUP
$44.99
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SKU: 8300830
Overview
Built for shooters who want more capacity from compatible SIG SAUER P320 X-series factory magazines, this aftermarket extension adds room for additional rounds while keeping the setup tied to the original magazine spring and follower. It works with factory 9mm and .357SIG/.40 S&W compact and full-size magazines, and it is also compatible with the listed grip modules, including AXG, X5 LEGION, XFULL, XCARRY, and XCOMPACT. The extension is legal for USPSA Limited and Open competition, making it a practical option for match use where magazine capacity matters. As an aftermarket part, it is intended for specific magazine and grip-module combinations, so compatibility should be confirmed before use.
Why Hunters Choose the Sig Sauer
Adds Up
To five rounds to factory
Compatible Factory
Factory 9mm, .357SIG, and .40
Works Compact
Compact and full-size magazines for
Compatible Axg,
AXG, X5 LEGION, XFULL, XCARRY,
Legal Uspsa
Limited and Open competitions
Key Features
- Adds up to 5 rounds to factory SIG SAUER P320 X series magazines.
- Compatible with factory 9mm and .357SIG/.40 S&W compact and full-size magazines.
- Use with the factory magazine spring and follower; factory baseplate is not used.
- CNC machined from 6061-T6 aluminum and anodized black.
- Includes a stainless steel spring-loaded detent with black nitride finish.
- Compatible with AXG, X5 LEGION, XFULL, XCARRY, and XCOMPACT grip modules.
Best Used For
- Competitive SIG SAUER P320 X-series shooters seeking additional magazine capacity for USPSA Limited or Open use.
- Owners of factory 9mm P320 magazines wanting an aftermarket extension compatible with compact and full-size magazines.
- Shooters using AXG, X5 LEGION, XFULL, XCARRY, or XCOMPACT grip modules with compatible magazine setups.
- Users who prefer a CNC-machined aluminum extension and factory spring-and-follower compatibility.
- Range and match shooters needing a magazine baseplate extension that adds capacity without changing the factory magazine spring and follower.
Specifications
| Blade Finish | Black anodized |
|---|---|
| Capacity Increase | Up to 5 more rounds |
| Capacity Note | Most factory magazines will achieve +5 extra rounds in 9mm and +4 in .357SIG/.40 S&W |
| Compatibility | SIG SAUER P320 X series of pistols |
| Compatibility Note | Also compatible with a 21-round magazine in any Grip Module |
| Competition Legal | USPSA Limited and Open |
| Detent Finish | Black nitride |
| Detent Material | Stainless steel |
| Extended Magazine Length | 141.25 mm (5.56") |
| Factory Baseplate Use | Factory baseplate (floorplate) is not used |
| Factory Magazine Spring And Follower | Use with factory magazine spring and follower |
| Grip Module Compatibility | AXG, X5 LEGION, XFULL, XCARRY, XCOMPACT |
| Magazine Compatibility | Factory 9mm, .357SIG/.40 S&W, compact and full-size magazines |
| Material | 6061-T6 aluminum |
| Warranty | No warranty provided by SIG SAUER for this item; manufacturer contact required for warranty or service needs |
| Warranty Impact Note | Use of this part may void SIG SAUER Limited Lifetime Firearms or FCU Warranty |
Pros
- Adds up to five rounds to factory SIG SAUER P320 X series magazines.
- Compatible with factory 9mm, .357SIG, and .40 S&W magazines.
- Works with compact and full-size magazines for broader use.
- Compatible with AXG, X5 LEGION, XFULL, XCARRY, and XCOMPACT grip modules.
- Legal for USPSA Limited and Open competitions.
Considerations & Trade-offs
- Designed for SIG SAUER P320 X series factory magazines only, so compatibility is limited to the listed magazine and grip-module combinations.
- Capacity gain is caliber-dependent: most factory magazines are listed at +5 in 9mm and +4 in .357SIG/.40 S&W, so results are not identical across setups.
- This is an aftermarket part that may void SIG SAUER Limited Lifetime Firearms or FCU warranty, so warranty implications should be considered before installation.
- The factory baseplate is not used, and the extension is intended for use with the factory spring and follower, which means setup depends on the original magazine components.
Suggested Comparisons
- Pistol magazine extensions
- Competition shooting magazine accessories
- SIG SAUER P320 magazine parts
- Aftermarket handgun magazine baseplates
Suggested Accessories
- Pistol magazine spring and follower
- Magazine loading tool
- Pistol magazine pouch
- Cleaning supplies for pistol magazines
Frequently Asked Questions
What does the Henning Group P320 X Magazine Extension add to factory magazines?
It is designed to give you up to 5 more rounds in factory magazines for SIG SAUER P320 X series pistols. The product notes also state that most factory magazines will achieve +5 extra rounds in 9mm and +4 in .357SIG/.40 S&W.
Which SIG SAUER P320 magazines is this extension compatible with?
It is listed as compatible with factory 9mm, .357SIG, and .40 S&W compact and full-size magazines for SIG SAUER P320 X series pistols.
Which grip modules can this magazine extension be used with?
The listed compatible grip modules are AXG, X5 LEGION, XFULL, XCARRY, and XCOMPACT. It is also stated to be compatible with a 21-round magazine in any Grip Module.
Does this extension use the factory baseplate and spring?
The factory baseplate (floorplate) is not used. The product description says to use the factory magazine spring and follower.
Is this magazine extension legal for competition use?
The product description states that it is legal for USPSA Limited and Open competitions. If you need confirmation for a specific match or division, check the current rules for that event.