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"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)
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435
Products
170
In Stock
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Founded
USA
Origin

All DIA Products (170)

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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
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 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
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 Diamondback Sidekick Revolver .22LR/.22WMR 5.5in Barrel 9 Shot Silver/Black

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

$345.00
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 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
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 Diamondback DB075AS703 Revolver 357 Mag/38 Special 3" Stainless Steel

Diamondback DB075AS703 Revolver 357 Mag/38 Special 3" Stainl

$725.00
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 Diamondback DB380 Magazine 6rd Finger Extension Black

Diamondback DB380 Magazine 6rd Finger Extension Black

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

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

$113.00
✓ In Stock

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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
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 Diamondback 762X39C10M50B95R DB Barrel 7.62x39mm 10" Carbine-Length Bla...

Diamondback 762X39C10M50B95R DB Barrel 7.62x39mm 10" Carbine

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

Diamondback 762X39P7H50B95R DB Barrel 7.62x39mm 7" Black Nit

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

Diamondback 308M135M50B10 .308 Win 13.5" Barrel Black Nitrid

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

Diamondback 223WR18H50B7R 18" Heavy Barrel 223 Wylde Rifle L

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

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

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

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

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

Diamondback Sidekick 22 LR/WMR Revolver 4.5" Black Cerakote

$284.00
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 Diamondback DB9 9mm Pistol 3" Barrel Black

Diamondback DB9 9mm Pistol 3" Barrel Black

$272.00
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 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
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 Diamondback DB9 9mm Pistol - Lightweight, Compact, USA-Made

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

$278.00
✓ In Stock
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The Springfield Armory KUNA — a roller-delayed 9mm pistol built in partnership with Croatia's HS Produkt — has becom...
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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

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