Diamondback DB15 Obsidian Series Rifle 6mm ARC 26rd Magazine 18″ Barrel 15″ M-LOK Rail
$922.73
The Diamondback DB15 Obsidian Series Rifle in 6mm ARC features an 18-inch barrel and a mid-length direct impingement gas system, making it an excellent choice for precision shooting and range training. Constructed from forged 7075 T-6 aluminum with a 15-inch M-LOK handguard, this rifle is designed for durability and versatility.
13 in stock
Features:
- Finish: Black Hardcoat Anodize
- Caliber: 6MM ARC
- Barrel: 18 in 1:7.5 RH Medium 4150 CrMoV Black Nitride
- Gas System: Mid-Length Direct Impingement
- BCG: Shot-Peened Magnetic Particle Inspected Mil-Spec 8620 Carrier
- Upper: A3 Flattop Forged 7075 T-6 Aluminum T-Marked
- Lower: Forged 7075 T-6 Aluminum w/ Magpul MOE Enhanced Trigger Guard
- Handguard: 15 in M-LOK Anti-Rotation V4 S-Rail w/ Full Picatinny and QD Mounts
- Grip: Magpul MOE K2 Grip
- Stock: Magpul CTR Carbine Stock
- Magazine: 26 Round Metal Magazine
- Sights: None
- Muzzle Device: DB Obsidian Muzzle Brake (5/8 x 24)
- Trigger: Standard Mil-Spec
- Weight: 6.8 lb
- Length (Length Collapsed / Length Extended): 35 in / 38.25 in
| Weight | 9.000 lbs |
|---|---|
| Dimensions | 40.000 × 9.000 × 3.500 in |
| Manufacturer | Diamondback |
| Action | Semi-automatic |
| Caliber | 6MM ARC |
| Barrel Length | 18.0 |
| Capacity | 26+1 |
| Finish | Black Hardcoat Anodize |
| Frame Material | 7075 T-6 Aluminum |
PROCESSING & SHIPPING
Orders typically ship within 1–3 business days (Monday–Friday) after payment and all required documentation are received. Time to arrival after shipment depends on the carrier. Shipping method is at BT Gun Company’s discretion; ammunition and oversized accessories are charged at actual shipping cost. We do not ship to Hawaii or Alaska.
FIREARM TRANSFERS
- Firearms must ship to a licensed FFL dealer of your choosing — confirm with them first that they can accept the transfer.
- Your receiving FFL will need to email their license to [email protected] before we can ship.
- Inspect your firearm at your FFL’s location before signing ATF Form 4473 — once signed, the firearm is considered accepted.
You’re responsible for knowing the firearms laws in your state before ordering. For complete shipping, returns, and restocking-fee policy details, see our Shipping & Returns page.

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