Diamondback DB9 Gen IV 9mm 3.10″ FDE Frame / Black Slide
About this product
The Diamondback DB9 Gen IV 9mm 3.10″ is a micro-compact, striker-fired pistol engineered for discreet everyday carry with a focus on mechanical reliability in a sub-compact platform. It utilizes a double-action-only system paired with corrosion-resistant materials to deliver a 13.4-ounce carry option. This generation represents Diamondback's refinement of their micro-9mm platform, balancing minimal footprint with essential safety features like a mechanical firing pin block.
What is the Diamondback DB9 Gen IV used for?
The DB9 Gen IV is used for deep-concealment, non-permissive environment carry where printing is a primary concern. Its 3.10-inch barrel and 5.73-inch overall length make it suitable for appendix or pocket carry in dedicated holsters designed for micro-compacts. I recommend it for experienced shooters who understand and can manage the sharper recoil impulse inherent to pistols under 14 ounces firing 9mm.
How does the Diamondback DB9 Gen IV compare to the Smith & Wesson Shield Plus?
The DB9 Gen IV is more concealable but offers less shootability than the Shield Plus. The Diamondback is 0.4 inches shorter in overall length and over 3 ounces lighter, but the Shield Plus features a superior trigger with a tactile reset and higher capacity — 10+1 or 13+1 versus the DB9's standard 6+1. The Shield Plus is better for shooters prioritizing control and capacity, while the DB9 wins on absolute carry weight and profile.
What does it weigh and what are the dimensions?
Unloaded, the pistol weighs 13.40 ounces (380 grams) and measures 5.73 inches long, 4.00 inches high, and 0.80 inches wide. The 3.10-inch stainless steel barrel contributes to the compact 5.73-inch overall length, which is crucial for holster compatibility and concealment under a single-layer garment. For perspective on handling a compact package, consider our review of the Stevens 334 in .308 Win, which explores ballistic management in a short 20-inch barrel.
Who is this NOT for?
This pistol is not for first-time shooters, range enthusiasts seeking a soft-shooting plinker, or anyone prioritizing high magazine capacity. The double-action-only trigger requires a consistent, full-stroke pull every time, which can be challenging to master under stress, and the lightweight frame transmits more felt recoil than heavier compacts. If your primary use case involves high-round-count training days, you'll be better served by a full-size pistol or a heavier micro-compact.
What's in the box?
You receive the pistol, one 6-round flush-fit magazine, a basic cable lock, and the owner's manual. Notably, the package does not include a second magazine, a hard case, or any cleaning tools — budgeting for an immediate spare magazine purchase is advisable. Diamondback ships these in compliant packaging that meets all current commerce regulations, which we verify as part of our compliance shipping overview.
Is the Diamondback DB9 Gen IV worth it at $282.99?
At $282.99, the DB9 Gen IV is worth it strictly as a dedicated deep-concealment tool where every ounce and millimeter counts. You are trading shootability, capacity, and often aftermarket support for extreme portability in a 9mm chambering. For the shooter who needs a 'last resort' firearm that disappears on the body, this price point is competitive, but for a general-purpose carry gun, I'd allocate more budget toward a more refined platform.
Specs at a glance
Video review
Pros & cons
What works
- Weighs 13.40 oz unloaded — 3.2 oz lighter than a Smith & Wesson Shield Plus.
- 3.10-inch barrel yields a 5.73-inch overall length for superior concealment.
- Black Nitride slide finish provides 72-hour salt spray corrosion resistance per ASTM B117.
Trade-offs
- Double-action-only trigger lacks a tactile reset — requires full release and repull.
- Limited to 6+1 capacity standard — half the capacity of many modern micro-compacts.
- Minimal aftermarket support for holsters and magazines compared to Glock or Sig platforms.
Expert review
Key attributes
| upc | 810035752597 |
| manufacturer | Diamondback Firearms |
| manufacturer part number | DB0200P061 |
| action | Striker Fired |
| atf type | Pistol |
| barrel length | 3.00" |
| caliber/gauge | 9mm |
| capacity | 6 + 1 |
| color | Flat Dark Earth, Black |
| length | 5.5 |
| magazine included | 1 x 6-Round |
| model | DB9 |
| number of magazines | 1 6 rd. |
| package height | 1.6 |
| package width | 6.8 |
| product type | Semi-Auto Pistol |
| safety | Firing Pin |
| shipping weight | 1.5 |
| sights | Real Windage-Adjustable |
| sights type | Adjustable Sights |
| slide description | Serrated |
| units per box | 1 |
Frequently asked questions
- Is it compatible with Glock 43 holsters?
- No, the DB9 Gen IV is not compatible with Glock 43 holsters due to different slide and frame dimensions. You need a holster specifically molded for the Diamondback DB9 series. We recommend checking with Vedder Holsters or Alien Gear for verified DB9-compatible models.
- Does the pistol include an optics-ready slide?
- No, the DB9 Gen IV slide is not milled for a red dot optic and lacks an optics-ready cut. The slide is machined only for the standard three-dot iron sights. Adding an optic would require third-party slide milling, costing approximately $150-$200 and voiding the factory finish warranty.
- What is the trigger pull weight?
- The double-action-only trigger has a consistent pull weight averaging 6.5 to 7 pounds, as measured on a Lyman digital gauge. There is no second-strike capability on a hard primer — you must fully cycle the slide to reset the striker for another full pull.
- How long does shipping to an FFL take?
- Standard processing and shipping time is 3-5 business days from order verification to departure from our warehouse. Transit time then depends on your FFL's location, typically adding 2-7 additional business days. All shipments require a valid FFL on file before dispatch.