Buy DIA Online

"Precision barrels and AR rifles built to perform"

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.

5.0★★★★★(5 verified DIA reviews)
Shop All DIA Products
435
Products
170
In Stock
-
Founded
USA
Origin

All DIA Products (170)

Buy Diamondback DB9 Gen 4 Magazine 9mm 6rd Steel Black Finish online Diamondback DB9 Gen 4 Magazine 9mm 6rd Steel Black Finish Buy Diamondback DB9MAGG4 DB9G4 9mm Luger 6 Round Steel Black Finish online Diamondback DB9MAGG4 DB9G4 9mm Luger 6 Round Steel Black Finish Buy Diamondback Firearms DBAM29 9mm 17-Round Stainless Steel Magazine online Diamondback Firearms DBAM29 9mm 17-Round Stainless Steel Magazine Buy Diamondback DBAM29MAG10R 9mm Luger 12 Round Stainless Steel online Diamondback DBAM29MAG10R 9mm Luger 12 Round Stainless Steel Buy Diamondback DB9 9mm 6-Round Detachable Black Magazine Steel online Diamondback DB9 9mm 6-Round Detachable Black Magazine Steel Buy Diamondback DB380 380ACP 6rd Magazine Finger Extension Black 380 ACP online Diamondback DB380 380ACP 6rd Magazine Finger Extension Black 380 ACP Buy Diamondback DB380 380 ACP 6-Round Flat-Bottom Magazine G10 online Diamondback DB380 380 ACP 6-Round Flat-Bottom Magazine G10 Buy Diamondback Firearms Vermin Tanto Black Knife Kydex Sheath online Diamondback Firearms Vermin Tanto Black Knife Kydex Sheath Buy Diamondback Firearms Southern Grind BadMonkey Emerson Tanto Knife online Diamondback Firearms Southern Grind BadMonkey Emerson Tanto Knife Buy Diamondback Firearms DB15 OBSIDIAN 300 BLK online Diamondback Firearms DB15 OBSIDIAN 300 BLK Buy Diamondback Firearms DB15 OBSIDIAN 300 BLK online Diamondback Firearms DB15 OBSIDIAN 300 BLK Buy Diamondback Firearms DB15 338 ARC online Diamondback Firearms DB15 338 ARC Buy Diamondback DB15 300 AAC Blackout DB191BB001 online Diamondback DB15 300 AAC Blackout DB191BB001 Buy Diamondback Firearms DB0780S993 357 0780S993 online Diamondback Firearms DB0780S993 357 0780S993 Buy Diamondback Firearms DB0780S991 357/38 0780S991 online Diamondback Firearms DB0780S991 357/38 0780S991 Buy Diamondback Firearms DB15 5.56 NATO DB15 online Diamondback Firearms DB15 5.56 NATO DB15 Buy Diamondback DB075AS703 357 Mag online Diamondback DB075AS703 357 Mag Buy Diamondback Firearms DB1718B002 300AAC Blackout online Diamondback Firearms DB1718B002 300AAC Blackout Buy Diamondback Firearms DB1718T002 350 Legend online Diamondback Firearms DB1718T002 350 Legend Buy Diamondback Firearms DB1720H002 223 Wylde online Diamondback Firearms DB1720H002 223 Wylde Buy Diamondback Firearms DB1718K071 5.56 NATO online Diamondback Firearms DB1718K071 5.56 NATO Buy Diamondback Firearms DB1718K061 5.56 NATO online Diamondback Firearms DB1718K061 5.56 NATO Buy Diamondback Firearms DB1718K001 5.56 NATO online Diamondback Firearms DB1718K001 5.56 NATO Buy Diamondback Firearms DB10 8.6 Blackout DB1280W281 online Diamondback Firearms DB10 8.6 Blackout DB1280W281 Buy Diamondback DB075AS701 .357 Mag 634 online Diamondback DB075AS701 .357 Mag 634 Buy Diamondback Firearms DB1784V001 6mm ARC online Diamondback Firearms DB1784V001 6mm ARC Buy Diamondback Firearms DB1984K101 5.56 NATO online Diamondback Firearms DB1984K101 5.56 NATO Buy Diamondback Firearms DB15 Obsidian 5.56 NATO online Diamondback Firearms DB15 Obsidian 5.56 NATO Buy Diamondback Firearms DB15 5.56 NATO online Diamondback Firearms DB15 5.56 NATO Buy Diamondback Firearms DB1784K791 5.56 NATO online Diamondback Firearms DB1784K791 5.56 NATO Buy Diamondback Firearms DB15 223/5.56 1780H631 online Diamondback Firearms DB15 223/5.56 1780H631 Buy Diamondback Firearms Sidekick Unknown online Diamondback Firearms Sidekick Unknown Buy Diamondback Firearms Sidekick 22LR/22WMR 634 22 LR | 22 Magnum online Diamondback Firearms Sidekick 22LR/22WMR 634 22 LR | 22 Magnum Buy Diamondback Sidekick 22 LR DB053CA051 online Diamondback Sidekick 22 LR DB053CA051 Buy Diamondback Sidekick .22 LR DB053CA001 online Diamondback Sidekick .22 LR DB053CA001 Buy Diamondback Firearms DB15 223 Rem/5.56 NATO online Diamondback Firearms DB15 223 Rem/5.56 NATO Buy Diamondback Firearms DB1784K061 5.56 NATO online Diamondback Firearms DB1784K061 5.56 NATO Buy Diamondback Firearms DB15 5.56 NATO online Diamondback Firearms DB15 5.56 NATO Buy Diamondback Firearms DB15 300 BLACKOUT DB1780B281 online Diamondback Firearms DB15 300 BLACKOUT DB1780B281 Buy Diamondback Firearms DB174AK041 5.56 NATO DB174AK041 online Diamondback Firearms DB174AK041 5.56 NATO DB174AK041 Buy Diamondback Firearms DB1799K005 5.56 NATO DB1799K005 online Diamondback Firearms DB1799K005 5.56 NATO DB1799K005 Buy Diamondback Firearms DB1790K005 5.56 NATO DB1790K005 online Diamondback Firearms DB1790K005 5.56 NATO DB1790K005 Buy Diamondback Sidekick Double/Single Action Revolver .22LR/.22 Magnum online Diamondback Sidekick Double/Single Action Revolver .22LR/.22 Magnum Buy Diamondback Sidekick .22 Cal 4.5" 9-Rounds online Diamondback Sidekick .22 Cal 4.5" 9-Rounds Buy Diamondback DB9 9mm online Diamondback DB9 9mm Buy Diamondback Firearms Sidekick .22 LR/.22 WMR 5.5In 9rd Silver/Black online Diamondback Firearms Sidekick .22 LR/.22 WMR 5.5In 9rd Silver/Black Buy Diamondback Firearms DB15 .300 BLK online Diamondback Firearms DB15 .300 BLK Buy Diamondback AR-15 5.56 NATO DB171AK201 online Diamondback AR-15 5.56 NATO DB171AK201

About DIA

DIA offers precision barrels and AR-style rifles designed for shooters who want reliable performance and consistent accuracy. Their product range includes short carbine barrels, pistol-length and rifle-length options, and complete DB15 semi-automatic rifles suited to tactical, range, and home defense roles. Barrels are produced in a variety of calibers such as 7.62x39, .308 Winchester, and .223/223 Wylde, with finishes like black nitride and materials such as 4150 steel. DIA components are designed to fit common AR platforms and give builders and shooters straightforward, dependable options for upgrades and builds.

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 Cerakote Convertible Revolver

Diamondback Sidekick 22LR/22Mag 9Rd 5.5" Barrel Black Cerako

$284.00
✓ In Stock · 1 sold this month
 Diamondback AM2 9mm Pistol 3.5" Barrel Black

Diamondback AM2 9mm Pistol 3.5" Barrel Black

$316.00
✓ In Stock
 DIAMONDBACK DB15 5.56mm 16in 30rd OD Green Semi-Auto Rifle (DB171BK103)

DIAMONDBACK DB15 5.56mm 16in 30rd OD Green Semi-Auto Rifle (

$600.00
✓ In Stock
 Diamondback Sidekick Revolver .22LR/.22WMR 5.5in Barrel 9 Shot Silver/Black

Diamondback Sidekick Revolver .22LR/.22WMR 5.5in Barrel 9 Sh

$345.00
✓ In Stock
 Diamondback DB15 OBSIDIAN 300 BLK 30+1 10.5 Chrome-Moly Black Anodized Hardcoat

Diamondback DB15 OBSIDIAN 300 BLK 30+1 10.5 Chrome-Moly Blac

$937.00
✓ In Stock
 Diamondback DB075AS703 Revolver 357 Mag/38 Special 3" Stainless Steel

Diamondback DB075AS703 Revolver 357 Mag/38 Special 3" Stainl

$725.00
✓ In Stock
 Diamondback DB380 Magazine 6rd Finger Extension Black

Diamondback DB380 Magazine 6rd Finger Extension Black

$27.00
✓ In Stock
 Diamondback 762X39C16M50B95R 16" 7.62x39mm AR-15 Barrel Black Nitride

Diamondback 762X39C16M50B95R 16" 7.62x39mm AR-15 Barrel Blac

$113.00
✓ In Stock

Shop DIA Products

Diamondback DB2380B001 .300 Blackout DB15 SBR 10" M-LOK 30rd Black

Diamondback DB2380B001 .300 Blackout DB15 SBR 10" M-LOK 30rd

$1,060.00
✓ In Stock
 DIAMONDBACK SDR 357 Mag/38 Special 2in 6rd Stainless Revolver (DB0700S701)

DIAMONDBACK SDR 357 Mag/38 Special 2in 6rd Stainless Revolve

$614.00
✓ In Stock
 Diamondback 762X39C10M50B95R DB Barrel 7.62x39mm 10" Carbine-Length Bla...

Diamondback 762X39C10M50B95R DB Barrel 7.62x39mm 10" Carbine

$99.00
✓ In Stock
 Diamondback 762X39P7H50B95R DB Barrel 7.62x39mm 7" Black Nitride 4150 C...

Diamondback 762X39P7H50B95R DB Barrel 7.62x39mm 7" Black Nit

$88.00
✓ In Stock
 Diamondback 308M135M50B10 .308 Win 13.5" Barrel Black Nitride 4150 Steel

Diamondback 308M135M50B10 .308 Win 13.5" Barrel Black Nitrid

$128.00
✓ In Stock
 Diamondback 223WR18H50B7R 18" Heavy Barrel 223 Wylde Rifle Length

Diamondback 223WR18H50B7R 18" Heavy Barrel 223 Wylde Rifle L

$109.00
✓ In Stock
 Diamond Atomic Bow Package Purple 12-24 in. 29 lbs. LH

Diamond Atomic Bow Package Purple 12-24 in. 29 lbs. LH

$241.00
✓ In Stock
 DIAMONDBACK DB1911 45ACP 8+1 5" Match Grade Barrel Stainless

DIAMONDBACK DB1911 45ACP 8+1 5" Match Grade Barrel Stainless

$1,970.00
✓ In Stock
 Diamondback Sidekick 22 LR/WMR Revolver 4.5" Black Cerakote 9rd

Diamondback Sidekick 22 LR/WMR Revolver 4.5" Black Cerakote

$284.00
✓ In Stock
 Diamondback DB9 9mm Pistol 3" Barrel Black

Diamondback DB9 9mm Pistol 3" Barrel Black

$272.00
✓ In Stock
 Diamondback DB9 Gen IV 9mm 3.1 in Barrel Black Polymer 6 Rds Striker Fired

Diamondback DB9 Gen IV 9mm 3.1 in Barrel Black Polymer 6 Rds

$284.00
✓ In Stock
 Diamondback DB9 9mm Pistol - Lightweight, Compact, USA-Made

Diamondback DB9 9mm Pistol - Lightweight, Compact, USA-Made

$278.00
✓ In Stock
View All DIA Products →

DIA News & Articles

May 31, 2026

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...
May 30, 2026

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...
Apr 16, 2026

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...
Apr 16, 2026

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

.223 Remington / 5.56 NATO

Ready to Shop DIA?

Choose DIA when you want straightforward, compatible barrels and AR platforms that deliver consistent performance and value....

Browse All Products
Your Data is Protected
256-bit SSL Encryption PCI Compliant Checkout Secure Payment Processing