DB15 5.56 NATO SEMI-AUTO PISTOL W/300 BLACKOUT UPPER – DB15 5.56 NATO 7”BBL W/300BLK UPPER (1)5.56(1)300BLK MAG

Specifications

  • Cartridge: 300 AAC Blackout
  • Length: 7.5''
  • Capacity: 30+1-Round
  • Action Type: Semi-Auto
  • Safety: Thumb
  • Barrel Length: 7''
  • Make: Diamondback
  • Weight: 5.1 lbs
DIAMONDBACK DB15 5.56 NATO SEMI-AUTO PISTOL W/300 BLACKOUT UPPER
 
The Diamondback DB15 Combo Kit delivers exceptional versatility in a compact Modern Sporting Rifle (MSR) pistol platform by combining two complete upper assemblies with a single AR-15 pistol lower. The primary configuration features a 7” 5.56 NATO pistol, ideal for compact handling and close-quarters performance, while the included 10” .300 AAC Blackout upper allows fast caliber conversion for optimized suppressed or subsonic use.
 
By simply swapping uppers, shooters can transition between calibers while maintaining consistent ergonomics and controls. This combo kit is built on forged 7075-T6 aluminum receivers and equipped with M-LOK handguards for accessory flexibility, making it an adaptable solution for range use and multi-role applications.
 
FEATURES
  • Dual-caliber combo package with two complete uppers
  • 7” 5.56 NATO pistol configuration (installed)
  • Additional 10” .300 AAC Blackout complete upper
  • Forged 7075-T6 aluminum upper and lower receivers
  • Free-float M-LOK handguards on both uppers
  • Pistol-length gas systems for both calibers
  • A2 flash hiders (caliber-appropriate thread patterns)
  • Magpul MOE pistol grip
  • Pistol buffer tube with foam cover
  • BCG and charging handle shared between uppers (one set included)
SPECS
  • Manufacturer: Diamondback Firearms
  • Model: DB15
  • Platform: AR-15 / MSR Pistol
  • Action: Semi-Automatic
  • Gas System: Pistol Length (both uppers)
  • Capacity: 30+1 (where legal)
  • Finish: Black, Hard Coat Anodized
  • 5.56 NATO UPPER
  • Barrel Length: 7”
  • Barrel Material: Chrome-Moly, Black Nitride Finish
  • Twist Rate: 1:8 RH
  • Muzzle Thread: 1/2×28
  • Muzzle Device: A2 Flash Hider
  • .300 AAC BLACKOUT UPPER
  • Barrel Length: 10”
  • Barrel Material: Chrome-Moly, Black Nitride Finish
  • Muzzle Thread: 5/8×24
  • Muzzle Device: A2 Flash Hider
  • Controls: Standard AR-15
  • Sights: Optic-Ready Flat Top
Description

Original price was: $939.99.Current price is: $795.00.

DIAMONDBACK DB15 5.56 NATO SEMI-AUTO PISTOL W/300 BLACKOUT UPPER
 
The Diamondback DB15 Combo Kit delivers exceptional versatility in a compact Modern Sporting Rifle (MSR) pistol platform by combining two complete upper assemblies with a single AR-15 pistol lower. The primary configuration features a 7” 5.56 NATO pistol, ideal for compact handling and close-quarters performance, while the included 10” .300 AAC Blackout upper allows fast caliber conversion for optimized suppressed or subsonic use.
 
By simply swapping uppers, shooters can transition between calibers while maintaining consistent ergonomics and controls. This combo kit is built on forged 7075-T6 aluminum receivers and equipped with M-LOK handguards for accessory flexibility, making it an adaptable solution for range use and multi-role applications.
 
FEATURES
  • Dual-caliber combo package with two complete uppers
  • 7” 5.56 NATO pistol configuration (installed)
  • Additional 10” .300 AAC Blackout complete upper
  • Forged 7075-T6 aluminum upper and lower receivers
  • Free-float M-LOK handguards on both uppers
  • Pistol-length gas systems for both calibers
  • A2 flash hiders (caliber-appropriate thread patterns)
  • Magpul MOE pistol grip
  • Pistol buffer tube with foam cover
  • BCG and charging handle shared between uppers (one set included)
SPECS
  • Manufacturer: Diamondback Firearms
  • Model: DB15
  • Platform: AR-15 / MSR Pistol
  • Action: Semi-Automatic
  • Gas System: Pistol Length (both uppers)
  • Capacity: 30+1 (where legal)
  • Finish: Black, Hard Coat Anodized
  • 5.56 NATO UPPER
  • Barrel Length: 7”
  • Barrel Material: Chrome-Moly, Black Nitride Finish
  • Twist Rate: 1:8 RH
  • Muzzle Thread: 1/2×28
  • Muzzle Device: A2 Flash Hider
  • .300 AAC BLACKOUT UPPER
  • Barrel Length: 10”
  • Barrel Material: Chrome-Moly, Black Nitride Finish
  • Muzzle Thread: 5/8×24
  • Muzzle Device: A2 Flash Hider
  • Controls: Standard AR-15
  • Sights: Optic-Ready Flat Top

Out of stock

SKU 430118024 Category

Description

DIAMONDBACK DB15 5.56 NATO SEMI-AUTO PISTOL W/300 BLACKOUT UPPER
 
The Diamondback DB15 Combo Kit delivers exceptional versatility in a compact Modern Sporting Rifle (MSR) pistol platform by combining two complete upper assemblies with a single AR-15 pistol lower. The primary configuration features a 7” 5.56 NATO pistol, ideal for compact handling and close-quarters performance, while the included 10” .300 AAC Blackout upper allows fast caliber conversion for optimized suppressed or subsonic use.
 
By simply swapping uppers, shooters can transition between calibers while maintaining consistent ergonomics and controls. This combo kit is built on forged 7075-T6 aluminum receivers and equipped with M-LOK handguards for accessory flexibility, making it an adaptable solution for range use and multi-role applications.
 
FEATURES
  • Dual-caliber combo package with two complete uppers
  • 7” 5.56 NATO pistol configuration (installed)
  • Additional 10” .300 AAC Blackout complete upper
  • Forged 7075-T6 aluminum upper and lower receivers
  • Free-float M-LOK handguards on both uppers
  • Pistol-length gas systems for both calibers
  • A2 flash hiders (caliber-appropriate thread patterns)
  • Magpul MOE pistol grip
  • Pistol buffer tube with foam cover
  • BCG and charging handle shared between uppers (one set included)
SPECS
  • Manufacturer: Diamondback Firearms
  • Model: DB15
  • Platform: AR-15 / MSR Pistol
  • Action: Semi-Automatic
  • Gas System: Pistol Length (both uppers)
  • Capacity: 30+1 (where legal)
  • Finish: Black, Hard Coat Anodized
  • 5.56 NATO UPPER
  • Barrel Length: 7”
  • Barrel Material: Chrome-Moly, Black Nitride Finish
  • Twist Rate: 1:8 RH
  • Muzzle Thread: 1/2×28
  • Muzzle Device: A2 Flash Hider
  • .300 AAC BLACKOUT UPPER
  • Barrel Length: 10”
  • Barrel Material: Chrome-Moly, Black Nitride Finish
  • Muzzle Thread: 5/8×24
  • Muzzle Device: A2 Flash Hider
  • Controls: Standard AR-15
  • Sights: Optic-Ready Flat Top

Additional information

Weight 5.85 lbs
Length

7.5''

Cartridge

AKK_5.56 x 45, CCP_300 AAC Blackout

Capacity

30+1-Round

Action Type

Semi-Auto

Safety

Thumb

Barrel Length

7''

Make

Diamondback

Weight

5.1 lbs

Finish

Black

Front Sight

None

Rear Sight

None

Stock Material

Synthetic

Make/Model

Diamondback, DB15

Muzzle

Flash Hider

Magazine Included

2 x 30-Round

Magazine Type

Removable

Model

DB15

Frequently Asked Questions

Are these brass cases and reloading components factory-new or once-fired? +

We stock both premium factory-new components and high-quality once-fired brass. Please check the specific product listing title and description carefully; once-fired brass is fully inspected, but we always recommend resizing and inspecting prior to priming and powder charging.

Will this case trimmer gauge or die set work with my progressive press setup? +

Our standard reloading dies and case length trimmer accessories utilize industry-standard threads (typically 7/8"-14) compatible with major single-stage, turret, and progressive presses like RCBS, Hornady, Lee Precision, and Dillon. Caliber-specific trim gauges must match your exact brass caliber.

Do you enforce shipping restrictions on powder, primers, or live ammunition? +

Yes. Non-hazardous reloading equipment (dies, case length trimmers, gauges, and unprimed brass) ships via standard ground carriers with no extra fees. Any orders containing smokeless powders or primers will incur standard federal HazMat handling fees and cannot be shipped via air transportation.

How can I track my shipment to ensure delivery safety? +

Precision reloading gear is valuable, so all orders are shipped with tracking enabled. As soon as your package is dispatched from our inventory warehouse, a tracking number will be emailed to you. You can monitor your shipment directly on our Track Order page using your unique Order ID.

Can I return precision measuring tools or die components if they don’t fit? +

We accept returns on unused, unaltered tools, case preparation equipment, and unopened component boxes within 30 days of item delivery. Due to safety and strict quality control on the reloading bench, we absolutely cannot accept returns on opened packs of primers, smokeless powder, or processed brass casings.