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.300 Blackout Diamondback

Diamondback is a family-owned American firearms manufacturer based on Florida’s Space Coast, known for precision engineering and in-house production standards. The brand offers a diverse lineup, including rifles built on proven AR platforms, versatile ar ak pistols, and innovative revolvers like the Sidekick, which features both.22LR and.22Mag cylinders for flexible use. Diamondback also supplies high-quality barrels for custom builds and upgrades. Featured products include popular calibers such as 5.56x45 and.223 / 5.56, with models designed for reliability and performance in both recreational and professional settings. Diamondback’s commitment to American manufacturing and quality control ensures every firearm meets rigorous standards. Browse Diamondback to shop performance-driven firearms and components for sale.

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20 Product(s)
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Diamondback DB15 .223/5.56 NATO & .300 Blackout Combo 16" Barrel 30rd Semi-Auto Rifle W/ Extra Upper Rec, FDE W/ Black Magpul Furniture (DB1721K061)

Diamondback DB15 .223/5.56 NATO & .300 Blackout Combo 16" Barrel 30rd Semi-Auto Rifle W/ Extra Upper Rec, FDE W/ Black Magpul Furniture (DB1721K061)
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Diamondback Firearms DB15 Obsidian Pistol DB1984B001 Pistol 300 AAC Blackout 10.5" 30+1 Semi-Auto SBA5 Brace M-LOK

Diamondback Firearms DB15 Obsidian Pistol DB1984B001 Pistol 300 AAC Blackout 10.5" 30+1 Semi-Auto SBA5 Brace M-LOK

$907 78
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Diamondback DB1915B061 DB15 28+1 10", FDE, Carbon Lower, 9" M-LOK Handguard, Black Padded Buffer Tube/Magpul Grip

Diamondback DB1915B061 DB15 28+1 10", FDE, Carbon Lower, 9" M-LOK Handguard, Black Padded Buffer Tube/Magpul Grip

$725 00
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Diamondback DB1916B001 DB15 300 AAC 30+1 10" Black Hard Coat Anodized Heavy Barrel 9" M-LOK Handguard 7075-T6 Aluminum SBA3 Brace Magpul MOE Grip

Diamondback DB1916B001 DB15 300 AAC 30+1 10" Black Hard Coat Anodized Heavy Barrel 9" M-LOK Handguard 7075-T6 Aluminum SBA3 Brace Magpul MOE Grip

$732 00
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Diamondback DB15 .300 Blackout Rifle, 16" Threaded, M-LOK, 30+1, Bronze

Diamondback DB15 .300 Blackout Rifle, 16" Threaded, M-LOK, 30+1, Bronze

$733 00
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Diamondback Firearms DB15 Carbon Series DB1718B062 Rifle, 300 AAC Blackout, 16" Barrel, 30+1, Semi-Auto, FDE, 15" M-LOK Rail, Threaded Barrel.

Diamondback Firearms DB15 Carbon Series DB1718B062 Rifle, 300 AAC Blackout, 16" Barrel, 30+1, Semi-Auto, FDE, 15" M-LOK Rail, Threaded Barrel.

$733 00
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Diamondback DB15 DB1718B002 Rifle, 300 AAC Blackout, 16" Threaded Barrel, 30+1, Semi-Auto, 15" M-LOK Rail, Optics-Ready.

Diamondback DB15 DB1718B002 Rifle, 300 AAC Blackout, 16" Threaded Barrel, 30+1, Semi-Auto, 15" M-LOK Rail, Optics-Ready.

$685 00
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Diamondback Firearms DB15 Carbon Series DB171BB102 Rifle, 300 AAC Blackout, 16" Barrel, 30+1, Semi-Auto, OD Green Cerakote, 15" M-LOK Rail

Diamondback Firearms DB15 Carbon Series DB171BB102 Rifle, 300 AAC Blackout, 16" Barrel, 30+1, Semi-Auto, OD Green Cerakote, 15" M-LOK Rail

$672 00
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Diamondback DB Barrel .300 Blackout 16" Pistol Length Black Nitride

Diamondback DB Barrel .300 Blackout 16" Pistol Length Black Nitride

$94 00
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Diamondback DB1731B001 DB15 16" 30+1 Black Adjustable Magpul CTR Stock Black Magpul MOE K2 Grip with Black Gold Lower

Diamondback DB1731B001 DB15 16" 30+1 Black Adjustable Magpul CTR Stock Black Magpul MOE K2 Grip with Black Gold Lower
$845 00
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Diamondback DB Barrel 300P85H50B8R 8.50" 300 Blackout 4150 CMV Nitride AR-15 Pistol-Length Barrel

Diamondback DB Barrel 300P85H50B8R 8.50" 300 Blackout 4150 CMV Nitride AR-15 Pistol-Length Barrel

$72 00
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Diamondback 300P10H50B8R .300 Blackout 10" Pistol-Length Barrel Heavy Nitride

Diamondback 300P10H50B8R .300 Blackout 10" Pistol-Length Barrel Heavy Nitride
$80 00
In Stock
Diamondback DB-15 300 BLK 8" Semi-Auto Pistol - DB191BB001

Diamondback DB-15 300 BLK 8" Semi-Auto Pistol - DB191BB001

$702 00
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Diamondback DB1915B001 DB15 28+1 10", Black, Carbon Lower, 9" M-LOK Handguard, Padded Buffer Tube, Magpul Grip

Diamondback DB1915B001 DB15 28+1 10", Black, Carbon Lower, 9" M-LOK Handguard, Padded Buffer Tube, Magpul Grip

Out of Stock
Diamondback DB175AB002 300 Blackout DB15 30rd Black

Diamondback DB175AB002 300 Blackout DB15 30rd Black

Out of Stock
Diamondback DB1796B001 DB15 *NY Compliant 16" 10+1 Black Thorsden Featureless GenII FRS-15 Stock Right Hand 12" M-LOK

Diamondback DB1796B001 DB15 *NY Compliant 16" 10+1 Black Thorsden Featureless GenII FRS-15 Stock Right Hand 12" M-LOK

Out of Stock
Diamondback DB1719B001 DB15 16" 30+1 Black Hard Coat Anodized Adjustable Magpul MOE Carbine Stock Black Magpul MOE Grip

Diamondback DB1719B001 DB15 16" 30+1 Black Hard Coat Anodized Adjustable Magpul MOE Carbine Stock Black Magpul MOE Grip

Out of Stock
Diamondback DB1718B061 DB15 16" 30+1 Flat Dark Earth Cerakote Adjustable Magpul MOE Carbine Stock Black Magpul MOE Grip

Diamondback DB1718B061 DB15 16" 30+1 Flat Dark Earth Cerakote Adjustable Magpul MOE Carbine Stock Black Magpul MOE Grip

Out of Stock
Diamondback DB1718B041 DB15 16" 30+1 Burnt Bronze Cerakote Adjustable Magpul MOE Carbine Stock Black Magpul MOE Grip

Diamondback DB1718B041 DB15 16" 30+1 Burnt Bronze Cerakote Adjustable Magpul MOE Carbine Stock Black Magpul MOE Grip
Out of Stock
Diamondback DB1718B001 DB15 16" 30+1 Black Hard Coat Anodized Adjustable Magpul MOE Carbine Stock Black Magpul MOE Grip

Diamondback DB1718B001 DB15 16" 30+1 Black Hard Coat Anodized Adjustable Magpul MOE Carbine Stock Black Magpul MOE Grip
Out of Stock
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