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"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.
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Products
64
In Stock
-
Founded
USA
Origin
All ONE Products (64)
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 September 2026
Trending right now based on the last 30 days of TheGunDock orders + page views.
One Horse RYN Titanium Direct Thread Suppressor .30 Cal 1.5
$454.00
✓ In Stock
One Hundred Concepts ParacordQD Sling Mount Fits Picatinny R
$30.00
✓ In Stock
One Hundred Concepts ScopeCap Pro Lens Cover Fits 30MM Scope
$60.00
✓ In Stock
One Hundred Concepts ScopeCap NKF Fits Scope with a 59mm Obj
$56.00
✓ In Stock
One Hundred Concepts HexCap Kill Flash Fits Holosun 507C Mat
$35.00
✓ In Stock
ONE HORSE OH-15 PISTOL HGA 5.56 NATO 7.5 IN BBL KAK BRACE BL
$606.00
✓ In Stock
ONE OH-CU05 10.5" 300 BLACKOUT COMPLETE UPPER RCVR
$284.00
✓ In Stock
One Hundred Concepts ShockCollar Accessory Fits Size 3 Scope
$31.00
✓ In Stock
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ONE HORSE 5.56 NATO 16 IN HBAR BBL COMPLETE UPPER RECEIVER
$311.00
✓ In Stock
ONE HORSE OH-15 PISTOL HGA 5.56 NATO 7.5 IN BBL KAK BRACE BL
$606.00
✓ In Stock
ONE HORSE 5.56 NATO 16 IN BBL COMPLETE UPPER RECEIVER CARBIN
$291.00
✓ In Stock
ONE HORSE OH-15 PISTOL HGA 300BLACKOUT 7.5 IN BBL KAK BRACE
$606.00
✓ In Stock
One Hundred Concepts ShockCollar Accessory Fits Large LightC
$31.00
✓ In Stock
ONE OH-UBC02 M16 NICKEL BORON BCG 556 300BO
$124.00
✓ 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
$18.00
✓ In Stock
One OH-CU01 16" 5.56 Nato Complete Upper Rcvr
$291.00
✓ In Stock
ONE OH-CU02 10.5" 5.56 NATO COMPLETE UPPER
$284.00
✓ In Stock
ONE OH-CU03 7.5" 5.56 NATO COMPLETE UPPER
$276.00
✓ In Stock
ONE News & Articles
Aug 13, 2026
The NFA Ruling Took Effect Today: What It Changes, and What It Does Not
A federal court struck down NFA registration for suppressors and short barreled firearms, and the ruling took effect Aug...
Aug 10, 2026
Can an FFL Ship a Gun to Your House? What the New ATF Proposal Actually Says
A proposed ATF rule would let licensed dealers complete a sale and ship a firearm to a buyer without that buyer setting ...
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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