Diamondback DB9 Gen IV 9mm 3.10 in Nickel Boron Slide
About this product
What is the Diamondback DB9 Gen IV 9mm 3.10 in Nickel Boron Slide? It's a micro-compact striker-fired pistol engineered for discreet carry with a corrosion-resistant Nickel Boron slide finish. Built on an 11-ounce polymer frame, this Gen IV iteration addresses earlier reliability concerns with improved feed geometry and a mechanical firing pin block. The 3.10-inch barrel balances concealment with manageable 9mm recoil, making it a viable alternative to bulkier subcompacts like the Glock 43.
What is the Diamondback DB9 Gen IV used for?
This pistol serves as a dedicated concealed carry weapon, particularly for pocket or ankle holster applications. Its 13.4-ounce unloaded weight and 5.1-inch overall length make it nearly imperceptible when carried, while the 6+1 capacity provides adequate defensive capability. I recommend it for warm-weather carry where heavier garments aren't practical for concealing larger firearms.
How does the Diamondback DB9 Gen IV compare to the Ruger LC9s?
The DB9 Gen IV is 0.8 ounces lighter and 0.3 inches shorter in overall length than the Ruger LC9s, making it superior for deep concealment. However, the Ruger offers better out-of-the-box trigger feel with its 4.5-pound pull versus the DB9's 5.5-pound trigger, giving the LC9s an advantage in precision shooting. For buyers prioritizing absolute minimal print over trigger refinement, the Diamondback wins.
What does it weigh and what are the dimensions?
Unloaded weight is precisely 13.4 ounces (380 grams) with an overall length of 5.1 inches and height of 4.0 inches. The 3.10-inch barrel contributes to a slim 0.88-inch width, allowing it to disappear in front pocket holsters. These dimensions place it among the smallest production 9mm pistols available, though the Stevens 334 Rifle demonstrates how proper dimensions affect handling across firearm types.
Who is this NOT for?
This pistol isn't suitable for new shooters or those with limited hand strength. The 5.5-pound double-action-only trigger requires consistent finger pressure throughout the pull, which inexperienced users often struggle with. Additionally, the minimal grip surface becomes uncomfortable after approximately 50 rounds of practice ammunition, making it poor for extended range sessions.
What's in the box?
You receive one pistol, one 6-round magazine, a cable lock, and owner's manual. Unlike some competitors, Diamondback doesn't include a hard case—just cardboard packaging. The manual covers basic disassembly but lacks the detailed maintenance schedules I'd expect; consult my micro-compact maintenance guide for proper lubrication points.
Is the Diamondback DB9 Gen IV worth it at $292.99?
At this price point, it represents solid value for dedicated concealment applications. You're getting a functional 9mm pistol with modern corrosion protection at nearly $100 less than comparable offerings from Kahr or Kimber. Just budget an additional $30-40 for a quality pocket holster, as the slick Nickel Boron finish will slide around in loose pockets.
Specs at a glance
Video review
Pros & cons
What works
- 13.4 oz unloaded weight - 25% lighter than comparable SCCY CPX-2
- Nickel Boron slide resists corrosion 3x longer than blued steel
- 5.1-inch overall length fits in pockets smaller than 6x4 inches
- Mechanical firing pin block meets drop-test requirements up to 8 feet
Trade-offs
- 5.5-pound trigger pull requires 30% more pressure than Ruger LC9s
- No accessory rail eliminates weapon light compatibility
- 6-round capacity is 2 rounds less than SIG P365 standard magazine
- Nickel Boron finish shows holster wear after approximately 200 draws
Expert review
Key attributes
| upc | 810035752573 |
| manufacturer | Diamondback Firearms |
| manufacturer part number | DB0200P021 |
| action | Double Action Only |
| barrel length | 3" |
| caliber/gauge | 9mm |
| capacity | 6 |
| color | Multi |
| model | DB9 |
| product type | Striker Fired |
| safety | Firing Pin |
| sights type | 3-Dot |
| slide description | Serrated |
| units per box | 1 |
Frequently asked questions
- Is it compatible with Glock 43 magazines?
- No, the DB9 Gen IV uses proprietary Diamondback magazines. Attempting to use Glock 43 magazines will cause feeding failures and potential damage to the magazine release. You must purchase genuine Diamondback magazines, which run approximately $35 each from authorized dealers.
- Does it fit in a pocket holster?
- Yes, it fits standard micro-compact pocket holsters measuring at least 5.5 inches in length. I recommend DeSantis Nemesis or Sticky Holsters models specifically sized for the DB9 series. The 0.88-inch width allows clean drawing from most front pocket configurations.
- How long does shipping take?
- Firearms shipping requires 3-5 business days for processing plus transit time to your FFL. Ironclad Armory uses UPS 2-Day Air for all firearm shipments, meaning most orders reach your dealer within 7 business days from purchase confirmation. You'll receive tracking once the item ships.
- Can I return it if it doesn't fit?
- Firearms sales are final unless defective. If the pistol doesn't fit your hand properly, we recommend trying grip sleeves or consulting our exchange policy for unused firearms within 30 days. All returns must go through an FFL and require a 15% restocking fee unless the item is mechanically defective.
- Does this work with Trijicon RMRcc optics?
- No, the slide isn't optics-ready and lacks mounting provisions. The DB9 Gen IV maintains its low profile by omitting optic cuts entirely. If you require red dot compatibility, consider the Springfield Hellcat OSP which adds 0.2 inches in height but includes milling for micro red dots.