Buy ONE Online
"Purpose-built AR uppers, barrels, and BCGs"
ONE produces AR components and complete uppers, including barrels, bolt carrier groups, muzzle devices, and assembled uppers. We carry a rotating in-stock selection of their nickel boron BCGs, 5.56 and 300 BLK barrels, and complete uppers.
Shop All ONE Products51
Products
41
In Stock
-
Founded
USA
Origin
All ONE Products (41)
One Hundred Concepts ScopeCap Pro Lens Cover Fits 52MM Scope Lenses Matte
One Hundred Concepts Ruggedized Rear ScopeCap Lens Cover Fits 44.5-46.5mm
One Hundred Concepts ScopeCap Lens Cover Fits 41-44mm Rear Optics Matte
One Hundred Concepts Ruggedized Rear ScopeCap Lens Cover Fits 40.2mm Rear
One Hundred Concepts AdminCap Light Cover Fits Surefire Vampire Light
One Hundred Concepts Ruggedized LightCap Light Cover Fits Cloud Defense
One Hundred Concepts Ruggedized LightCap Light Cover Fits Surefire
One Hundred Concepts ScopeCap Pro Lens Cover Fits 59MM Scope Lenses Matte
One Hundred Concepts ScopeCap Pro Lens Cover Fits 65MM Scope Lenses Matte
One Hundred Concepts ScopeCap Pro Lens Cover Fits 53MM Scope Lenses Matte
One Hundred Concepts ShockCollar Accessory Fits Size 3 ScopeCap Matte
One Hundred Concepts ShockCollar Accessory Fits Size 2 ScopeCap Matte
One Hundred Concepts ShockCollar Accessory Fits Size 1 ScopeCap Matte
One Hundred Concepts Ruggedized LightCap Light Cover Fits Cloud Defense
One Hundred Concepts ShockCollar Accessory Fits Medium LightCap Matte
One Hundred Concepts ShockCollar Accessory Fits Small LightCap Matte
One Hundred Concepts HexCap Kill Flash Fits Holosun 507C Matte Finish
One Hundred Concepts ParacordQD Sling Mount Fits M-LOK Rail Matte Finish
One Hundred Concepts HexCap Kill Flash Fits Aimpoint Micro Optics Matte
One Hundred Concepts ScopeCap Pro Lens Cover Fits 34MM Scope Lenses Matte
One Hundred Concepts ScopeCap Pro Lens Cover Fits 30MM Scope Lenses Matte
One Hundred Concepts ScopeCap Accessory Universal Fit Matte Finish Black
One Hundred Concepts ScopeCap Accessory Universal Fit Matte Finish Black
One Hundred Concepts ScopeCap Accessory Universal Fit Matte Finish Black
One Hundred Concepts ShockCollar Accessory Fits Surefire Turbo HRT AWLS
One Horse RYN Titanium Direct Thread Suppressor .30 Cal 1.5 Dia 5/8X24 Black
One Horse ASHE Titanium Direct Thread Suppressor 5.56mm 1.5 Dia 1/2X28 Black
One Horse OH-CU09 6mm 18in Tactical AR15 Upper
One Horse OH OP01 5.56 30Rd 10.5 Inch Tactical Pistol
ONE OHOG02 5.56 15 In 30+1 M-LOK
One Horse OH-OG03 6mm ARC 18 In 30+1
ONE OHOG04 300BO 15 In 30+1 M-LOK
One OH-OG01 OH-15 Complt Rfl 5.56 15" M-LOK
ONE OH-CU06 7.5" 300 BLACKOUT COMPLETE UPPER RCVR
ONE OH-CU04 16" 300 BLACKOUT COMPLETE UPPER RCVR
ONE OHCU03 5.56 NATO 7.5 Inch Complete Upper Tactical
One OH-FH02 30 Cal A2 Flash Hide/Crush Wash 5/8 24
ONE OHBR06 300BO 10.5in Tactical Optics Ready Rifle
ONE OHBR05 5.56 NATO 10.5 Inch Tactical Optics Ready
ONE OH-UBC02 M16 NICKEL BORON BCG 556 300BO
One Off R-STOCKAD-1 AK Zhukov Picatinny Stock Adapter AK-47
About ONE
ONE focuses on AR platform components and complete uppers, offering bolt carrier groups, barrels, muzzle devices, and finished upper assemblies. Their lineup includes nickel boron coated BCGs, short carbine-length barrels in 5.56 NATO and 300 Blackout, A2-style flash hiders, and compact complete uppers ready to pair with lowers. Products from ONE are built to fit common AR specifications, emphasizing straightforward compatibility and practical features. Their parts are intended for builders and shooters who need reliable, drop-in components like 10.5 inch carbine barrels, 7.5 inch complete uppers, and 30 caliber flash hiders that use standard threading and gas options.
Headquarters
Established
-
Country of Origin
USA
History & Heritage
Specific founding details for ONE are not available here. The brand is known for supplying AR components and assembled uppers that cater to builders, shooters, and retailers seeking common-spec parts and compact configurations.
Notable Products
Nickel boron BCGs, short 5.56 and 300 Blackout barrels, A2-style flash hiders, and complete uppers.
Why Choose ONE?
Choose ONE when you want practical, spec-compatible AR components and ready-to-install uppers.
Hot ONE Items June 2026
Trending right now based on the last 30 days of TheGunDock orders + page views.
One Hundred Concepts ScopeCap Pro Lens Cover Fits 30MM Scope
$65.00
✓ In Stock
One Hundred Concepts ShockCollar Accessory Fits Small LightC
$31.00
✓ In Stock
One Hundred Concepts ScopeCap Pro Lens Cover Fits 59MM Scope
$97.00
✓ In Stock
ONE OH-BR06 10.5" 300BO 1:7
$97.00
✓ In Stock
One Hundred Concepts ScopeCap Lens Cover Fits 41-44mm Rear O
$46.00
✓ In Stock
One OH-OG01 OH-15 Complt Rfl 5.56 15" M-LOK
$511.00
✓ In Stock
ONE HORSE AR15 COMPLETE UPPER 18" 6MM
$443.00
✓ In Stock
One Hundred Concepts ScopeCap Accessory Universal Fit Matte
$31.00
✓ In Stock
Shop ONE Products
ONE OH-UBC02 M16 NICKEL BORON BCG 556 300BO
$118.00
✓ In Stock
ONE OH-BR05 10.5" CARB GAS 5.56 NATO BRL
$97.00
✓ In Stock
ONE OH-BR06 10.5" 300BO 1:7
$97.00
✓ In Stock
One OH-FH02 30 Cal A2 Flash Hide/Crush Wash 5/8 24
$19.00
✓ In Stock
ONE OH-CU03 7.5" 5.56 NATO COMPLETE UPPER
$276.00
✓ In Stock
ONE OH-CU04 16" 300 BLACKOUT COMPLETE UPPER RCVR
$288.00
✓ In Stock
ONE OH-CU06 7.5" 300 BLACKOUT COMPLETE UPPER RCVR
$291.00
✓ In Stock
One OH-OG01 OH-15 Complt Rfl 5.56 15" M-LOK
$511.00
✓ In Stock
ONE OH-OG04 OH-15 COMPLT RFL 300BO 15" M-LOK
$477.00
✓ In Stock
ONE HORSE OH-15 COMPLETE RIFLE 6MM ARC 18" 30RD MAGPUL
$614.00
✓ In Stock
ONE OH-OG02 OH-15 COMPLT RFL 5.56 15" MLOK CLG
$477.00
✓ In Stock
ONE HORSE OH-15 5.56 AR PISTOL 10.5" BBL KAK BRACE 30RD
$540.00
✓ In Stock
ONE 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...
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Choose ONE when you want practical, spec-compatible AR components and ready-to-install uppers....
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