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5.56x45 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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Diamondback DBK1717K005 DB15 AR-15 Platform Rifle, 16" Barrel,1 in 8 Twist, 15" M-Lok Rail, 5.56 Nato, MOE Stock, Grip & 30rd Mag, Black

Diamondback DBK1717K005 DB15 AR-15 Platform Rifle, 16" Barrel,1 in 8 Twist, 15" M-Lok Rail, 5.56 Nato, MOE Stock, Grip & 30rd Mag, Black
$538 00
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Diamondback Firearms DB Barrel 556M16M50B8R 16" 5.56x45mm NATO 4150 CMV Black Nitride AR-15 Platform

Diamondback Firearms DB Barrel 556M16M50B8R 16" 5.56x45mm NATO 4150 CMV Black Nitride AR-15 Platform

$86 00
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Diamondback DB1799K001 DB15 *CO Compliant 16" 10+1 Black Hard Coat Anodized Magpul MOE Carbine Stock

Diamondback DB1799K001 DB15 *CO Compliant 16" 10+1 Black Hard Coat Anodized Magpul MOE Carbine Stock

$652 00
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Diamondback DB1790K001 DB15 *CA Compliant 16" 10+1 Black Adjustable Magpul MOE Carbine Stock Black Magpul MOE Grip Right Hand 12" M-LOK

Diamondback DB1790K001 DB15 *CA Compliant 16" 10+1 Black Adjustable Magpul MOE Carbine Stock Black Magpul MOE Grip Right Hand 12" M-LOK

$704 00
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Diamondback DB175AK061 DB15 16" 30+1 Flat Dark Earth 6 Position Stock Black Magpul MOE Grip

Diamondback DB175AK061 DB15 16" 30+1 Flat Dark Earth 6 Position Stock Black Magpul MOE Grip
$652 00
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Diamondback DB1721K001 DB15 Combo 5.56x45mm NATO & 300 Blackout 16" 30+1, Black, Magpul Stock & Grip Includes Upper

Diamondback DB1721K001 DB15 Combo 5.56x45mm NATO & 300 Blackout 16" 30+1, Black, Magpul Stock & Grip Includes Upper

$974 00
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Diamondback DB175AK221 DB15 30+1 16" Chrome Moly Barrel, Black Hard Coat Anodized Receiver, Adjustable Magpul CTR Flat Dark Earth Stock, Flat Dark Earth Magpul Grip

Diamondback DB175AK221 DB15 30+1 16" Chrome Moly Barrel, Black Hard Coat Anodized Receiver, Adjustable Magpul CTR Flat Dark Earth Stock, Flat Dark Earth Magpul Grip

$606 00
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Diamondback DB175AK591 DB15 16" 30+1, Black with Prison Pink Accents, Carbon Lower, 15" M-Lok Handgaurd, Magpul Carbine Stock, A2 Grip

Diamondback DB175AK591 DB15 16" 30+1, Black with Prison Pink Accents, Carbon Lower, 15" M-Lok Handgaurd, Magpul Carbine Stock, A2 Grip

$618 00
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Diamondback DB Barrel 556C16H50B8NYR 16" 5.56x45mm NATO Chrome Moly Vanadium Black Nitride AR-15 Compatible

Diamondback DB Barrel 556C16H50B8NYR 16" 5.56x45mm NATO Chrome Moly Vanadium Black Nitride AR-15 Compatible

$86 00
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Diamondback DB Barrel 556C16M50B8R 16" 5.56x45mm NATO Black Nitride 4150 CMV Steel AR-15 Carbine-Length

Diamondback DB Barrel 556C16M50B8R 16" 5.56x45mm NATO Black Nitride 4150 CMV Steel AR-15 Carbine-Length
$86 00
In Stock
Diamondback DB Barrel 556C16MF50B8R 16" 5.56x45mm NATO 4150 Chrome Moly Vanadium Black Nitride AR-15

Diamondback DB Barrel 556C16MF50B8R 16" 5.56x45mm NATO 4150 Chrome Moly Vanadium Black Nitride AR-15

$86 00
In Stock
Diamondback DB1874K001 DB15 16" 30+1 Black Adjustable Magpul ACS-L Stock Black Magpul MOE-K2+ Grip

Diamondback DB1874K001 DB15 16" 30+1 Black Adjustable Magpul ACS-L Stock Black Magpul MOE-K2+ Grip

$1342 00
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Diamondback DB Barrel 556P7H50B8R 7" 5.56x45mm NATO 4150 Chrome Moly Black Nitride AR-15 Pistol-Length

Diamondback DB Barrel 556P7H50B8R 7" 5.56x45mm NATO 4150 Chrome Moly Black Nitride AR-15 Pistol-Length

$70 00
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Diamondback DB Barrel 556C10M50B8R 10" 5.56x45mm NATO 4150 CMV Black Nitride AR-15 Carbine-Length

Diamondback DB Barrel 556C10M50B8R 10" 5.56x45mm NATO 4150 CMV Black Nitride AR-15 Carbine-Length

$81 00
In Stock
Diamondback DB1784K001 556 DB15 30rd M-LOK Black

Diamondback DB1784K001 556 DB15 30rd M-LOK Black

$967 00
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Diamondback DB1784K061 556 DB15 30rd M-LOK FDE

Diamondback DB1784K061 556 DB15 30rd M-LOK FDE

$1014 00
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Diamondback DB1784K101 556 DB15 30rd M-LOK ODG

Diamondback DB1784K101 556 DB15 30rd M-LOK ODG

$1014 00
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Diamondback DB175AK621 556 DB15 30rd M-LOK Camo

Diamondback DB175AK621 556 DB15 30rd M-LOK Camo

$866 00
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Diamondback DB1913K061 Pist FDE 7" SBA3

Diamondback DB1913K061 Pist FDE 7" SBA3

$773 00
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Diamondback DB15 Carbon DB1916K061 Pistol 5.56 NATO 10" 30+1 Semi-Auto FDE Cerakote 9" M-LOK Rail, Threaded Barrel.

Diamondback DB15 Carbon DB1916K061 Pistol 5.56 NATO 10" 30+1 Semi-Auto FDE Cerakote 9" M-LOK Rail, Threaded Barrel.

$773 00
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Diamondback DB1984K001 Obsidian 30+1 11.50" Black Nitride 11" M-LOK Handguard SBA5 Brace Magpul MOE K2 Grip

Diamondback DB1984K001 Obsidian 30+1 11.50" Black Nitride 11" M-LOK Handguard SBA5 Brace Magpul MOE K2 Grip

$967 00
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Diamondback DB1916K001 DB15 AR Pistol Carbine Length 10" 30+1 Black SBA3 Pistol Brace Stock

Diamondback DB1916K001 DB15 AR Pistol Carbine Length 10" 30+1 Black SBA3 Pistol Brace Stock

$732 00
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Diamondback DB1874K061 DB15 16" 30+1 Flat Dark Earth Adjustable Magpul ACS-L Stock Black Magpul MOE-K2+ Grip

Diamondback DB1874K061 DB15 16" 30+1 Flat Dark Earth Adjustable Magpul ACS-L Stock Black Magpul MOE-K2+ Grip

$1088 88
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Diamondback DB1758K001 DB15 16" 30+1 Black Adjustable Magpul ACS-L Stock Black Magpul MOE-K2+ Grip

Diamondback DB1758K001 DB15 16" 30+1 Black Adjustable Magpul ACS-L Stock Black Magpul MOE-K2+ Grip

$1201 00
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