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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 (166)
Diamondback DB1874K061 DB15 5.56 NATO Rifle 16" FDE Magpul Stock M-LOK Rail
Diamondback Firearms DB15 AR-Style Semi-Auto Tactical Rifle .223 Remington
Diamondback DB1060M071 6.5 Creedmoor 20" M-Lok Semi-Auto Rifle
Diamondback DB1060M061 DB10 6.5 Creedmoor 20" 20+15+1 Flat Dark Earth
Diamondback DB10 6.5 Creedmoor 20" Black Magpul MOE Carbine Stock
Diamondback DB1629L001 DBX57 BGFB 5.7x28mm 8" 20+1 Black Hard Coat...
Diamondback DBX57 5.7x28mm Semi-Auto Pistol 8" Barrel Black
Diamondback DB0301P061 9mm Luger 3.5in Black Nitride 17+1 Striker Fired
Diamondback DBAM29 Sub-Compact 9mm Luger Pistol with Laser
Diamondback DB0300P031 9mm Pistol 12+1/17+1 Black/Stainless 3.5" Barrel
Diamondback DBAM29 Sub-Compact 9mm Pistol, 3.5" Barrel, Polymer Frame, 3-Dot Sights
Diamondback AM2 9mm Pistol 3.5" Barrel Black
Diamondback DB0200P031 DB9 9mm 6+1 Two-Tone Polymer Frame Pistol
Diamondback Firearms DB9 G4 Semi-Auto Pistol 9mm Luger 3.1" Barrel (1)-6Rd
Diamondback DB0200P101 9mm Pistol, 3" Barrel, OD Green, 6+1 Capacity
Diamondback DB9 Compact 9mm Pistol 3" Barrel FDE Black
Diamondback DB9 9mm Pistol - Lightweight, Compact, USA-Made
Diamondback DB9 Gen IV 9mm 3.1 in Barrel Black Polymer 6 Rds Striker Fired
Diamondback DB9 9mm Pistol 3" Barrel Black
Diamondback Sidekick 22 LR/WMR Revolver 4.5" Black Cerakote 9rd
DIAMONDBACK DB1911 45ACP 8+1 5" Match Grade Barrel Stainless
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 June 2026
Trending right now based on the last 30 days of TheGunDock orders + page views.
Diamondback Sidekick Double/Single Action Revolver .22 LR/ W
Diamondback Sidekick 22 LR/WMR Revolver 4.5" Black Cerakote
DiamondBack DB15 Carbon 5.56 NATO 30+1 16 Jesse James Blue C
Diamondback DB0300P031 9mm Pistol 12+1/17+1 Black/Stainless
Diamondback 308M135M50B10 .308 Win 13.5" Barrel Black Nitrid
Diamondback DBAM29 Sub-Compact 9mm Pistol, 3.5" Barrel, Poly
DIAMONDBACK DB10 8.6 Blackout 16in 20rd Black Semi-Auto Rifl
Diamondback Sidekick Double/Single Action Revolver .22LR/.22
Shop DIA Products
Diamondback DB2380B001 .300 Blackout DB15 SBR 10" M-LOK 30rd
DIAMONDBACK SDR 357 Mag/38 Special 2in 6rd Stainless Revolve
Diamondback 300P10H50B8R 10" .300 Blackout Barrel 4150 CMV N
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
DBB BBL 556 16" CARB MED 1-9 BLK
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
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
When a firearm or ammo shipment arrives damaged, the claim process matters. TheGunDock walks through what to do, what we...
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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