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.223 / 5.56 Semi-Auto 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 DB15 DB175AK063 Rifle 5.56 NATO 16" 30+1 Semi-Auto Multicam Receiver B5 Bravo Stock

Diamondback DB15 DB175AK063 Rifle 5.56 NATO 16" 30+1 Semi-Auto Multicam Receiver B5 Bravo Stock

$705 79
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Diamondback DB1916K101 Pist ODG 10" SBA3

Diamondback DB1916K101 Pist ODG 10" SBA3

$773 00
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Diamondback DB15 Carbon DB1717K172 Rifle 5.56 16" Threaded Tiger Stripe Camo

Diamondback DB15 Carbon DB1717K172 Rifle 5.56 16" Threaded Tiger Stripe Camo

$693 62
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Diamondback Firearms DB15 Carbon DB1717K252 Rifle, 5.56 NATO, 16" Barrel, 30+1, Semi-Auto, Jesse James Blue, 15" M-LOK, Threaded Barrel.

Diamondback Firearms DB15 Carbon DB1717K252 Rifle, 5.56 NATO, 16" Barrel, 30+1, Semi-Auto, Jesse James Blue, 15" M-LOK, Threaded Barrel.

$654 44
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Diamondback DB15 DB1720H002 Rifle, .223 Wylde, 18" Barrel, 30+1, Semi-Auto, Black, M-LOK Rail, Threaded Barrel

Diamondback DB15 DB1720H002 Rifle, .223 Wylde, 18" Barrel, 30+1, Semi-Auto, Black, M-LOK Rail, Threaded Barrel

$734 00
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Diamondback DB1718K061 DB15 5.56 NATO 30+1 16" Flat Dark Earth Cerakote Picatinny Rail Aluminum Receiver

Diamondback DB1718K061 DB15 5.56 NATO 30+1 16" Flat Dark Earth Cerakote Picatinny Rail Aluminum Receiver

$719 00
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Diamondback DB1718K071 30+1 16" Midnight Bronze

Diamondback DB1718K071 30+1 16" Midnight Bronze

$719 00
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Diamondback DB1718K001 DB15 Carbon 16 M-LOK 15 MOE PR Black 30rd

Diamondback DB1718K001 DB15 Carbon 16 M-LOK 15 MOE PR Black 30rd

$605 42
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Diamondback DB15 Obsidian DB1984K101 Pistol 5.56 NATO 11.5" 30+1 Semi-Auto ODG Cerakote SBA5 Brace M-LOK

Diamondback DB15 Obsidian DB1984K101 Pistol 5.56 NATO 11.5" 30+1 Semi-Auto ODG Cerakote SBA5 Brace M-LOK

$1014 00
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Diamondback DB15 Obsidian DB1984K061 Pistol, 5.56 NATO, 11.5" Barrel, 30+1, Semi-Auto, SBA5 Brace, FDE, M-LOK, Threaded Barrel.

Diamondback DB15 Obsidian DB1984K061 Pistol, 5.56 NATO, 11.5" Barrel, 30+1, Semi-Auto, SBA5 Brace, FDE, M-LOK, Threaded Barrel.

$1014 00
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Diamondback DB1784K791 DB15 30rd 16" Black Nitride Jungle Green Cerakote 7075-T6 Aluminum Receiver Magpul MOE K2 Grip

Diamondback DB1784K791 DB15 30rd 16" Black Nitride Jungle Green Cerakote 7075-T6 Aluminum Receiver Magpul MOE K2 Grip

$1014 00
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Diamondback DB1784K131 DB15 30rd 16" Black Nitride w/ FDE Cerakote Flat Dark Earth Cerakote 7075-T6 Aluminum Receiver Flat Dark Earth Magpul MOE K2 FDE Grip

Diamondback DB1784K131 DB15 30rd 16" Black Nitride w/ FDE Cerakote Flat Dark Earth Cerakote 7075-T6 Aluminum Receiver Flat Dark Earth Magpul MOE K2 FDE Grip

$1014 00
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Diamondback DB1913K101 Pist ODG 7" SBA3

Diamondback DB1913K101 Pist ODG 7" SBA3

$773 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 DB1915K071 DB15 AR Pistol Carbine Length 10" 30+1 Midnight Bronze Buffer Tube Stock

Diamondback DB1915K071 DB15 AR Pistol Carbine Length 10" 30+1 Midnight Bronze Buffer Tube Stock

$710 00
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Diamondback DB1717K004 DB15 Rem,5.56x45mm NATO 16" 30+1 Black Hard Coat Anodized 6 Position Stock Black A2 Grip

Diamondback DB1717K004 DB15 Rem,5.56x45mm NATO 16" 30+1 Black Hard Coat Anodized 6 Position Stock Black A2 Grip

$628 00
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Diamondback DB1912K001 DB15 AR Pistol Carbine Length 7" 30+1 Black Buffer Tube Stock

Diamondback DB1912K001 DB15 AR Pistol Carbine Length 7" 30+1 Black Buffer Tube Stock

$652 00
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Diamondback DB1912K061 DB15 AR Pistol Carbine Length 7" 30+1 Flat Dark Earth Buffer Tube Stock

Diamondback DB1912K061 DB15 AR Pistol Carbine Length 7" 30+1 Flat Dark Earth Buffer Tube Stock

$710 00
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Diamondback DB1912K071 DB15 AR Pistol Carbine Length 7" 30+1 Midnight Bronze Buffer Tube Stock

Diamondback DB1912K071 DB15 AR Pistol Carbine Length 7" 30+1 Midnight Bronze Buffer Tube Stock

$710 00
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Diamondback DB1915K001 DB15 AR Pistol Carbine Length 10" 30+1 Black Buffer Tube Stock

Diamondback DB1915K001 DB15 AR Pistol Carbine Length 10" 30+1 Black Buffer Tube Stock

$652 00
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Diamondback DB1717K002 DB15 16" 30+1 Black 6 Position Stock Black A2 Grip Right Hand 10" Free-Float Quad Rail

Diamondback DB1717K002 DB15 16" 30+1 Black 6 Position Stock Black A2 Grip Right Hand 10" Free-Float Quad Rail
$678 00
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Diamondback DB1913K001 DB15 AR Pistol Carbine Length 7" 30+1 Black SBA3 Pistol Brace Stock

Diamondback DB1913K001 DB15 AR Pistol Carbine Length 7" 30+1 Black SBA3 Pistol Brace Stock

$732 00
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Diamondback DB1791K001 DB15 *CA Compliant 16" 10+1 Black Adjustable Magpul CTR Stock Black Magpul MOE K2 Grip with Black Gold Lower

Diamondback DB1791K001 DB15 *CA Compliant 16" 10+1 Black Adjustable Magpul CTR Stock Black Magpul MOE K2 Grip with Black Gold Lower

$905 00
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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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