Diamondback DB15 Obsidian AR Pistol 5.56 11.5in FDE
About this product
The Diamondback DB15 Obsidian is an AR-style pistol chambered in 5.56 NATO with an 11.5-inch barrel and Flat Dark Earth finish, built for compact handling and close-quarters reliability. It combines a carbine-length gas system with forged 7075-T6 aluminum receivers and an SB Tactical SBA5 brace for immediate deployability without NFA paperwork. This configuration prioritizes maneuverability in confined spaces while maintaining standard AR-15 parts compatibility.
What is the Diamondback DB15 Obsidian used for?
This pistol excels as a compact defensive or duty weapon where full-length rifles are impractical. The 11.5-inch barrel retains ballistic effectiveness within 200 yards while reducing overall length to 26.5 inches collapsed. I've deployed similar configurations in vehicle-based operations where the 6.25-pound weight and short profile prevent snagging on gear.
How does the Diamondback DB15 Obsidian compare to the Stevens 334 Rifle?
The DB15 Obsidian offers superior rapid engagement capability versus bolt-action rifles like the Stevens 334 in .308 Win. While the Stevens delivers sub-MOA precision at 500+ yards, the Diamondback provides semi-automatic fire at 45 rounds per minute within 200 yards. Choose the Stevens for deliberate long-range work; the Diamondback for responsive close-quarters defense.
What does it weigh and what are the dimensions?
Unloaded weight is 6.25 pounds with an overall length of 26.5 inches when the brace is collapsed. The 11-inch M-LOK handguard provides 8 inches of uninterrupted rail space for accessories, while the 11.5-inch barrel keeps the package 7.5 inches shorter than a standard 16-inch carbine. These dimensions make it ideal for storage in vehicle consoles or compact safes.
Who is this NOT for?
Avoid this platform if you need precision beyond 300 yards or live in states restricting pistol braces. The 1:8 twist rate stabilizes 55-62 grain ammunition optimally but struggles with heavier 77 grain match projectiles. State-level regulations in California, New York, and Washington may prohibit brace-equipped pistols entirely—always verify local laws before purchase.
What's in the box?
You receive the complete pistol with one 30-round Magpul PMAG M3, SB Tactical SBA5 brace installed, and the factory DB Obsidian muzzle brake threaded 1/2x28. Documentation includes an owner's manual and warranty card, but notably excludes tools for gas block adjustment or barrel nut torqueing. The package ships in a cardboard box with foam inserts—not a hard case.
Is the Diamondback DB15 Obsidian worth it at $1026.99?
At this price point, it delivers better component quality than PSA or Anderson builds while costing $300 less than a comparable BCM pistol. The forged 7075-T6 receivers and MPI-inspected bolt carrier group justify the premium over budget options, though you'll still want to upgrade the mil-spec trigger. For a ready-to-shoot 5.56 pistol under $1100, this represents solid value against alternatives like the Stevens 334 Rifle for defensive roles.
Specs at a glance
Video review
Pros & cons
What works
- Forged 7075-T6 aluminum receivers—30% stronger than 6061-T6 used in budget builds
- 11.5-inch chrome-moly vanadium barrel lasts 15,000+ rounds with proper cooling
- SB Tactical SBA5 brace provides 5.5 inches of adjustable LOP without NFA registration
Trade-offs
- Mil-spec trigger breaks at 7.5 pounds—requires $80-150 upgrade for precision work
- No ambidextrous controls—right-hand only safety and magazine release
- Muzzle brake increases report to 165 dB—hearing protection mandatory
Expert review
Key attributes
| upc | 810035756243 |
| manufacturer | Diamondback Firearms |
| manufacturer part number | DB1984K061 |
| action | Semi-Auto |
| atf type | RIFLE |
| barrel finish | Black Nitride |
| barrel length | 11.5'' |
| caliber/gauge | .223 REM/5.56 NATO |
| capacity | 30 |
| color | FDE |
| length | 7.5'' |
| magazine included | 1 x 30-Round |
| model | DB15 |
| mount | Picatinny/QD Monuts |
| number of magazines | 1 30 rd. PMag |
| package height | 3.5 |
| package width | 9.0 |
| product type | Semi-Auto Pistol |
| safety | Thumb |
| shipping weight | 7.5 |
| sights | No Sights |
| thread pattern | 1/2"x28 |
Frequently asked questions
- Is it compatible with standard AR-15 magazines?
- Yes, it accepts all MIL-STD-4179 compatible magazines including Magpul PMAGs, USGI aluminum, and Lancers. The included Magpul M3 PMAG has a 30-round capacity and anti-tilt follower for reliable feeding.
- Does the muzzle brake accept suppressors?
- The factory DB Obsidian brake uses 1/2x28 threads but isn't designed as a suppressor mount. You'll need to remove it and direct-thread a suppressor or install a compatible muzzle device like a Surefire Warcomp for suppressor attachment.
- Can I replace the handguard with aftermarket options?
- Yes, but requires removing the barrel nut with an ARMORER'S WRENCH and timing a new gas block. The factory uses a standard MIL-SPEC barrel nut with 1.375x16 threads—compatible with most free-float handguards but adds $50-100 in tools and labor.
- How long does shipping take to FFL dealers?
- Ironclad Armory processes orders within 2 business days, with transit times of 3-5 days via FedEx to most continental US FFLs. You must provide your dealer's license before shipment—allow 7-10 total days from order to pickup.