Diamondback DB9 Gen 4 9mm 6-Round Magazine with Finger Extension – MZDB9EXT6RD
Factory-style replacement magazine for the compact Diamondback DB9 Gen 4 pistol. It holds six rounds of 9mm ammunition and has an extended finger-rest baseplate for additional grip support.
The extended floorplate improves grip length but does not increase the magazine capacity.
Key Features
- Designed specifically for the Diamondback DB9 Gen 4
- Standard six-round capacity
- Chambered for 9mm Luger/9×19mm
- Steel magazine body
- Durable black finish
- High-visibility polymer follower
- High-tensile steel magazine spring
- Removable finger-extension baseplate
- Numbered witness holes on both sides
- Single-stack detachable design
Product Specifications
| Specification | Details |
|---|---|
| Product Code | MZDB9EXT6RD |
| Manufacturer | Diamondback Firearms |
| Manufacturer Part Number | DB9-MAGG4E |
| UPC | 815875012344 |
| Compatible Model | Diamondback DB9 Gen 4 |
| Calibre | 9mm Luger / 9×19mm |
| Capacity | 6 rounds |
| Magazine Type | Detachable single-stack |
| Body Material | Steel |
| Follower | High-visibility polymer |
| Spring | High-tensile steel |
| Baseplate | Removable finger extension |
| Finish | Black |
| Quantity | One magazine |
The DB9-MAGG4E reference, six-round capacity, steel body and removable finger-extension baseplate are confirmed by a detailed factory-magazine listing. Diamondback DB9 Gen 4 magazine specifications
Extended Floorplate
The extended polymer floorplate provides additional space for the shooter’s lower finger. This can improve grip comfort and control on the compact DB9 Gen 4.
The extension does not add ammunition capacity. The magazine remains a standard six-round magazine.
Because the baseplate extends below the grip, confirm clearance with tight-fitting holsters and magazine pouches.
Compatibility
Designed and verified for:
- Diamondback DB9 Gen 4
- Diamondback DB9G4 compact pistol
Not confirmed for:
- Diamondback DB9 Gen 1
- Diamondback DB9 Gen 2
- Diamondback DB9 Gen 3
- Diamondback DB9FS
- Other Diamondback handgun models
Earlier DB9 magazines may look similar, but the Gen 4 uses an updated baseplate design. Confirm the pistol generation before ordering.
Ammunition Compatibility
Use only the correct ammunition recommended for the DB9 Gen 4:
- 9mm Luger
- 9×19mm Parabellum
Do not use .380 ACP, 9×18mm Makarov, .38 Super, or other cartridges.
Maintenance
Keep the magazine body, follower and feed lips clean. Remove dirt, lint and residue that may interfere with cartridge movement.
Use lubricant sparingly. Excess oil can attract dust and contaminate ammunition. Do not bend, spread, file, or modify the feed lips.
Safety
Unload the pistol and confirm that the chamber is empty before inserting, removing, cleaning, or testing the magazine.
After insertion, pull down gently to confirm that the magazine is securely locked. Stop using it if it is damaged or causes repeated feeding problems.
Package Contents
- 1 × Diamondback DB9 Gen 4 9mm six-round magazine
- 1 × Installed finger-extension baseplate
Please Note
The pistol and ammunition are not included. Product images and minor finish details may differ between production batches.
This item may require special ordering. Estimated procurement time is 3–10 working days, subject to supplier availability. Stock levels may change hourly. A money-back guarantee applies if the correct magazine cannot be supplied.

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