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 Products61
Products
49
In Stock
-
Founded
USA
Origin
All ONE Products (49)
One Hundred Concepts Ruggedized LightCap Light Cover Fits Modlite OKW/PLH
One Hundred Concepts HexCap Kill Flash Fits Aimpoint ACRO P2 Matte Finish
One Hundred Concepts LightCap Cover Fits Cloud Defense Rein 1.0 OWL
One Hundred Concepts LightCap Cover Fits Modlite OKW/PLH Matte
One Hundred Concepts LightCap Cover Fits Surefire M300/M600
One Hundred Concepts ScopeCap Pro 52mm Matte Lens Cover
One Hundred Concepts Ruggedized Rear ScopeCap Fits 44.5-46.5mm
One Hundred Concepts ScopeCap Lens Cover Fits 41-44mm Rear Optics Matte
One Hundred Concepts Ruggedized Rear ScopeCap 40.2mm Lens Cover
One Hundred Concepts AdminCap Fits SureFire Vampire Light Cover
One Hundred Concepts HexCap Kill Flash Fits EOTech EXPS Matte Black
One Hundred Concepts Ruggedized LightCap Fits Cloud Defensive
One Hundred Concepts Ruggedized LightCap Light Cover Fits Surefire
One Hundred Concepts ScopeCap Pro 59mm Lens Cover Matte
One Hundred Concepts ScopeCap Pro 65mm Scope Lens Cover Matte
One Hundred Concepts ScopeCap Pro 53MM Matte Lens Cover
One Hundred Concepts ShockCollar Size 3 ScopeCap Matte Finish
One Hundred Concepts ShockCollar OHC-CLR-2
One Hundred Concepts ShockCollar ScopeCap Fits Size 1 Matte
One Hundred Concepts Ruggedized LightCap Light Cover Fits Cloud Defensive
One Hundred Concepts ShockCollar Fits Medium LightCap Matte
One Hundred Concepts ShockCollar Small LightCap Matte Accessory
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 Trijicon RMR Matte
One Hundred Concepts ScopeCap Pro 34mm Lens Cover Matte
One Hundred Concepts ScopeCap Pro 30MM Lens Cover Matte
One Hundred Concepts ScopeCap Universal Fit Matte Black
One Hundred Concepts ScopeCap Universal Fit Matte Black
One Hundred Concepts ScopeCap Universal Fit Matte Black
One Hundred Concepts ShockCollar 32mm Fits SureFire Turbo HRT AWLS
One Horse RYN Titanium DirectThread .30 Cal 1.5Dia 5/8x24 Black
One Horse ASHE Titanium DirectThread 5.56 NATO 1.5In Dia 1/2X28 Black
One Horse OH-15 .300 BLK OH-OP02
One Horse OH-15 5.56 NATO OH-OP01
One Horse OH-15 5.56 NATO OH-OG02
One Horse OH-15 6mm ARC OH-OG03
ONE OHOG04 300BO 15 In 30+1 M-LOK
One Horse OH-15 5.56 NATO OH-OG01
ONE OH-CU06 7.5" 300 BLACKOUT COMPLETE UPPER RCVR
ONE OHCU05 10.5 In .300 Blackout Complete Upper w/ BCG & CH
ONE OH-CU04 16" 300 BLACKOUT COMPLETE UPPER RCVR
One Horse OH-CU02 5.56 NATO 10.5 In Complete Upper
One OH-CU01 16" 5.56 Nato Complete Upper Rcvr
One OH-FH02 30 Cal A2 Flash Hide/Crush Wash 5/8 24
ONE OH-BR06 10.5" 300BO 1:7
ONE OH-BR05 10.5" CARB GAS 5.56 NATO BRL
ONE OHUBC02 M16 BCG 5.56/.300 Nickel Boron
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 August 2026
Trending right now based on the last 30 days of TheGunDock orders + page views.
One Hundred Concepts ScopeCap Accessory Universal Fit Matte
$31.00
✓ In Stock
One Hundred Concepts ParacordQD Sling Mount Fits M-LOK Rail
$28.00
✓ In Stock
One Hundred Concepts ShockCollar Accessory Fits Size 1 Scope
$31.00
✓ In Stock
ONE OH-OG04 OH-15 COMPLT RFL 300BO 15" M-LOK
$477.00
✓ In Stock
One Hundred Concepts ScopeCap Pro Lens Cover Fits 59MM Scope
$97.00
✓ In Stock
One Hundred Concepts Ruggedized Rear ScopeCap Lens Cover Fit
$46.00
✓ In Stock
ONE OH-CU02 10.5" 5.56 NATO COMPLETE UPPER
$287.00
✓ In Stock
ONE OH-OG02 OH-15 COMPLT RFL 5.56 15" MLOK CLG
$477.00
✓ 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-CU01 16" 5.56 Nato Complete Upper Rcvr
$296.00
✓ In Stock
ONE OH-CU02 10.5" 5.56 NATO COMPLETE UPPER
$287.00
✓ In Stock
ONE OH-CU04 16" 300 BLACKOUT COMPLETE UPPER RCVR
$307.00
✓ In Stock
ONE OH-CU05 10.5" 300 BLACKOUT COMPLETE UPPER RCVR
$287.00
✓ In Stock
ONE OH-CU06 7.5" 300 BLACKOUT COMPLETE UPPER RCVR
$292.00
✓ In Stock
One OH-OG01 OH-15 Complt Rfl 5.56 15" M-LOK
$477.00
✓ 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
$619.00
✓ 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...
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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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