Buy DIA Online
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 (167)
Diamondback DB051CA001 Sidekick 22 LR 9 Shot 4.50" Black Cerakote...
Diamondback Sidekick Revolver - Midnight Bronze Cerakote, 4.5" Barrel, 9rd
Diamondback DB Sidekick 22LR|22M Revolver 4.5" Dark Gray Cerakote
Diamondback Sidekick Revolver .22LR/.22Mag 3in Black Cerakote 9rd
Diamondback Firearms Carbon DB10 Semi-Automatic Rifle .308 Winchester
Diamondback DB171AK001 AR Rifle, 223/556, 16" Barrel, 15" MLOK, 30 Rounds
DIAMONDBACK DB15 5.56 16in 10rd Black CA Legal Semi-Auto Rifle (DB1791K001)
Diamondback DB1916K001 Pistol 5.56 30+1 M-LOK Rail SBA3 Brace Black
Diamondback DB1913K001 Pistol 5.56 30+1 M-LOK Rail SBA3 Brace Black
DIAMONDBACK DB15 5.56x45mm NATO 7in 30rd Semi-Auto AR Pistol (DB1912K071)
DIAMONDBACK DB15 5.56x45mm NATO 7in 30rd Black Semi-Auto Pistol DB1912K001
DIAMONDBACK DB10 Carbon Series 308 Win 16in 20rd Semi-Auto Rifle DB1018C071
Diamondback DB10 .308 Win AR Rifle 16" FDE
Diamondback DB1018C001 DB10 308 Win 20+1 16" Nitride Treated Threaded...
Diamondback DB1889K001 5.56 NATO 16" M-LOK Semi-Auto Rifle Black
Diamondback DB1200W001 8.6 Blackout 12" M-LOK Semi-Auto Rifle Black
Diamondback SDR Revolver 9mm Luger 2 inch 6 Rounds Stainless Steel Polis...
Diamondback DB0700S703 SDR 357 Mag/38 Special +P 6 3" Stainless Steel...
Diamondback DB0700S001 Revolver .357/.38 6-Shot Black Nitride Steel
Diamondback DB1916B101 DB15 300 AAC 30+1 10" OD Green Cerakote Heavy...
Diamondback DB1916B061 .300 Blackout Pistol 10" M-LOK SBA3 FDE 30rd
Diamondback DB1916B001 DB15 300 AAC 30+1 10" Black Hard Coat Anodized...
Diamondback DB1913K061 DB15 5.56 NATO 30+1 7" Flat Dark Earth Cerakote
Diamondback DB0700S711 SDR 357 Mag/38 Special +P 6 Shot 2" Glass Bead...
DIAMONDBACK DB10 8.6 Blackout 16in 20rd Black Semi-Auto Rifle (DB1080W001)
Diamondback DB15 SBR NFA Matte Black 30+1 223 Rem/5.56 NATO Short Barrel Rifle
Diamondback DB1732N061 DB156.5 Grendel 18" 5+128+1 Black Adjustable M...
DIAMONDBACK DB15 Black Gold 6.5 Grendel 18" 26rd/5rd Black Rifle DB1732N001
Diamondback DB15 5.56 NATO Rifle, 16" Barrel, Mid-Length Gas System, MOE-K2 Grip, CTR Stock
Diamondback DB1731K001 5.56 NATO 16in Threaded Black
DIAMONDBACK DB10 6.5 Creedmoor 20" 2Mag 20rd/5rd Semi-Auto Rifle DB1033M001
Diamondback DB15 308 WIN 20+1 13.5 Chrome-Moly Midnight Bronze Cerakote
Diamondback DB15 308 WIN 20+1 13.5 Chrome-Moly Flat Dark Earth Cerakote
Diamondback DB15 308 WIN 20+1 13.5 Chrome-Moly Black Hardcoat Anodized
DiamondBack DB15 Carbon 7.62x39 28+1 16 Black Anodized Hardcoat
DiamondBack DB15 Carbon 5.56 NATO 30+1 16 Flat Dark Earth Cerakote
DiamondBack DB15 Carbon 5.56 NATO 30+1 16 Jesse James Blue Cerakote
DiamondBack DB15 Carbon 5.56 NATO 30+1 16 Tiger Stripe Camo Cerakote
Diamondback DB0101E002 DB380 Gen4 w/Laser Micro-Compact Frame 380 ACP...
DIAMONDBACK DB380SL Gen4 .380 ACP 2.8in 6rd Semi-Auto Pistol (DB0100E032)
Diamondback DB380 Gen 4 .380 ACP Pistol Bronze/Black
Diamondback DB380 Gen 4 .380 ACP Pink/Black Pistol
Diamondback DB380 Gen4 .380 ACP 2.8 in Barrel FDE Polymer 6 Rounds DAO
Diamondback DB380 Gen4 .380 ACP 2.8 in Nickel Boron 6+1 Double Action
Diamondback DB0100E022 DB380 Gen4 Micro-Compact Frame 380 ACP 6+1 2.80"...
DIAMONDBACK DB380 Gen4 .380 ACP 2.8in 6rd Black Semi-Auto Pistol DB0100E002
Diamondback DB2070K001 5.56 DB15 Pistol 7" Pro Sights 9" M-Lok Black
Diamondback DB15 .223 Remington AR Rifle 16" Barrel FDE
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
Firearm Shipping Restrictions by State (2026 Update)
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...
Shop DIA by Caliber
Ready to Shop DIA?
Choose DIA when you want straightforward, compatible barrels and AR platforms that deliver consistent performance and value....
Browse All Products