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DIA supplies barrels and AR-style rifles, including carbine and rifle-length barrels and DB15 tactical platforms. We stock a selection of barrels in 7.62x39, .308, and .223/223 Wylde.
All DIA Products (170)
Diamondback Firearms DB380 Gen4 380 ACP
Diamondback Firearms DB0100E022 380 ACP
Diamondback Firearms DB380 Gen4 380 ACP
Diamondback DB15 5.56 DB2070K001
Diamondback Firearms DB15 223 Rem
Diamondback Firearms DB15 5.56 NATO
Diamondback DB15 5.56 NATO DB1874K061
Diamondback DB15 223 Remington DB1874K001
Diamondback Firearms DB10 6.5 Creedmoor
Diamondback Firearms DB10 308 Win 634
Diamondback Firearms DB1629L001 5.7 x 28mm
Diamondback DBX57 5.7x28mm DB1614L001 5.7 x 28mm
Diamondback Firearms DB0301P061 9mm
Diamondback Firearms DBAM29 9mm
Diamondback Firearms DBAM29 9mm
Diamondback Firearms AM2 9mm
Diamondback DB9 9mm DB0200P031
Diamondback Firearms DB9 9mm
Diamondback Firearms DB0200P101 9mm
Diamondback Firearms DB9 9mm
Diamondback Firearms DB9 9mm
Diamondback Firearms DB9 9X19+P
Diamondback Firearms DB9 9mm
Diamondback Firearms Sidekick 22 LR/22 Magnum
Diamondback Firearms DB1911 45ACP 634 45 ACP
ProMag Five Seven Iom And USG 5.7x28mm 20rd Polymer Black Magazine (FNH-A1)
About DIA
Headquarters
Established
-
Country of Origin
USA
History & Heritage
DIA is known for producing barrels and AR-style firearms and components. The brand grew by offering common calibers and barrel lengths that meet the needs of sport shooters, hobbyist builders, and tactical users. Specific founding details and headquarters are not provided here.
Notable Products
DB15 AR-style rifles and the DB series barrels in 7.62x39, .308, and 223/223 Wylde
Why Choose DIA?
Choose DIA when you want straightforward, compatible barrels and AR platforms that deliver consistent performance and value.
Hot DIA Items August 2026
Trending right now based on the last 30 days of TheGunDock orders + page views.
Diamondback Sidekick 22LR/22Mag 9Rd 5.5" Barrel Black Cerako
Diamondback DB075AS703 Revolver 357 Mag/38 Special 3" Stainl
Diamondback AM2 9mm Pistol 3.5" Barrel Black
DIAMONDBACK DB15 5.56mm 16in 30rd OD Green Semi-Auto Rifle (
Diamondback Sidekick Revolver .22LR/.22WMR 5.5in Barrel 9 Sh
Diamondback DB15 OBSIDIAN 300 BLK 30+1 10.5 Chrome-Moly Blac
Diamondback DB1799K005 5.56 NATO 16" Barrel 15" M-Lok Rail B
Diamondback DB380 Magazine 6rd Finger Extension Black
Shop DIA Products
Diamondback DB2380B001 .300 Blackout DB15 SBR 10" M-LOK 30rd
DIAMONDBACK SDR 357 Mag/38 Special 2in 6rd Stainless Revolve
Diamondback 762X39C10M50B95R DB Barrel 7.62x39mm 10" Carbine
Diamondback 762X39P7H50B95R DB Barrel 7.62x39mm 7" Black Nit
Diamondback 308M135M50B10 .308 Win 13.5" Barrel Black Nitrid
Diamondback 223WR18H50B7R 18" Heavy Barrel 223 Wylde Rifle L
Diamond Atomic Bow Package Purple 12-24 in. 29 lbs. LH
DIAMONDBACK DB1911 45ACP 8+1 5" Match Grade Barrel Stainless
Diamondback Sidekick 22 LR/WMR Revolver 4.5" Black Cerakote
Diamondback DB9 9mm Pistol 3" Barrel Black
Diamondback DB9 Gen IV 9mm 3.1 in Barrel Black Polymer 6 Rds
Diamondback DB9 9mm Pistol - Lightweight, Compact, USA-Made
DIA News & Articles
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State-by-state guide to firearm and ammunition shipping for online buyers and FFL dealers. Current as of May 2026. Cover...
Damaged in Transit: How TheGunDock Handles Shipping Claims on Firearms and Ammo
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The Springfield KUNA: Roller-Delayed 9mm Pistol That's Shaking Up the PDW Market
The Springfield Armory KUNA — a roller-delayed 9mm pistol built in partnership with Croatia's HS Produkt — has becom...
The Strait of Hormuz: 2,500 Years of Trade, Arms, and Conflict
A twenty-one-mile-wide choke point has shaped the movement of goods — and weapons — across half the ancient and mode...
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