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Built on the Umarex Notos
Haji-Notos Builder
50 to 1400Select optionsUmarex Notos Custom Builder
Options include a new Notos from us!The Notos is side lever repeater and one of the most affordable, accurate compact shooters on the market.
Using the available service options below, we can transform an already awesome Notos that flies JSB Hades 15.89 gr @ 744 ft/s for 24 shots up to an amazing 850 ft/s with over 130 shots shooting the same Hades 15.89 gr lead pellets!
We consistently hit targets at 70-100 yards with a red dot!
Our Custom Builder Interface allows you to select the build options and parts you want, and we build it for you. This service can include a new Notos or you send your in for the build. You can select a Notos of your dreams. When you receive it, all you need to do is shoot and enjoy!.
Base Options include:
- A New Notos PCP.
Additional Options:
- HubenPower Dream TK Adjustable Regulator.
- Power Plenum.
- Choice of 4500 psi Carbon Fiber Cylinder (300cc, 360cc, or 500cc).
- Buck Rail Grip Adapter (Tactical Frame Base)
- Enhanced Sidelever
- Barrel Modification Service, Which Includes:
Barrel transfer port increase and polish.
Stock suppressor removed.
A 1/2 x 20 threaded adapter installed for a Suppressor.
Bottle to Barrel Support Band for Notos Rigidity. - Internal Valving and Port Modifications for Greater Power Production, which includes:
Trigger sear face polished and lubricated.
Hammer spring upgrade. - Pistol Grip.
- Buffer Tube with Castle Nut.
- Butt Stock.
- Folding Stock Adapter.
- Suppressor.
- Expanded Magazine.
- Red Dot Sight.
- Fiber Optic Sight.
- Bipod
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Buck Rail Enhanced Side Lever
ENHANCED NOTOS SIDE LEVER
$20.00Select options- Smooth, quick, Enhanced Side Lever for the UX Notos
- Proudly Made in the USA by a veteran-owned business
- Advanced Laser Sintered PA12 Nylon Construction. LIFETIME WARRANTY
***The installation for this item is pretty involved, but worth it. Please watch the full installation video before purchasing***
This Enhanced Sidelever is compatible with the OEM stock for the Umarex Notos and the tactical AR grip adapter.
This is an edited version of the full Buck Rail video. The edit was made with the expressed written approval from Terry of Buck Rail.
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Sale!
With and Without Rail 300cc or 360cc bottle
Notos Bottle Converted – Barrel Band (Stock Barrel)
$25.00 – $30.00Price range: $25.00 through $30.00Select options** THIS BARREL BAND IS FOR THE STOCK BARREL THAT HAS THE MOLDED SUPPRESSOR IN PLACE – CLICK HERE IF YOU HAVE THE HAJIMOTO MODIFIED BARREL**

Available in two sizes and with or without Picatinny rail:
- 300cc/0.3L version
- 360cc/036L version
- Adds the necessary support and rigidity of the long bottle conversion assembly.
The barrel band is designed by Hajimoto Productions and made from ABS and Carbon Fiber for a strong and lightweight design. The barrel band is designed to live at the end of the cylinder as shown and has a section of Picatinny rail on the bottom to allow for the attaching of a bipod, flashlight, camera, or laser pointer. The Picatinny rail is not designed to support the entire air rifle in a clamp or tripod used in standing rests.
This Barrel band is specifically designed for a Umarex Notos with our HubenPower Dream TK installed with our 300cc or 360cc carbon fiber bottle with stock barrel suppressor installed.
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Sale!
With and Without Rail 300cc or 360cc bottle
Notos Bottle Converted – Barrel Band (Modded Barrel)
$25.00 – $30.00Price range: $25.00 through $30.00Select options** THIS BARREL BAND IS FOR THE HAJIMOTO MODIFIED BARREL – CLICK HERE IF YOU HAVE THE STOCK BARREL THAT HAS THE MOLDED SUPPRESSOR IN PLACE. CLICK HERE IF YOU HAVE THE FX BARREL WITH 22MM SHROUD INSTALLED**
Available in two sizes and with or without Picatinny rail:
- 300cc/0.3L version
- 360cc/036L version
- Adds the necessary support and rigidity of the long bottle conversion assembly.
The barrel band is designed by Hajimoto Productions and made from ABS and Carbon Fiber for a strong and lightweight design. The barrel band is designed to live at the end of the cylinder as shown and has a section of Picatinny rail on the bottom to allow for the attaching of a bipod, flashlight, camera, or laser pointer. The Picatinny rail is not designed to support the entire air rifle in a clamp or tripod used in standing rests.
This Barrel band is specifically designed for a Umarex Notos with our HubenPower Dream TK installed with our 300cc or 360cc carbon fiber bottle with a Hajimoto modified barrel installed.
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Sale!
With and Without Rail 360cc bottle
Notos Bottle Converted – Barrel Band (FX Barrel)
$30.00 – $35.00Price range: $30.00 through $35.00Select options** THIS BARREL BAND IS FOR THE FX BARREL KIT WITH 22MM SHROUD – CLICK HERE IF YOU HAVE THE STOCK BARREL THAT HAS THE MOLDED SUPPRESSOR IN PLACE OR CLICK HERE IF YOU HAVE A HAJIMOTO MODIFIED BARREL**
Available with or without Picatinny rail:
- 360cc/036L version
- Adds the necessary support and rigidity of the long bottle conversion assembly.
The barrel band is designed by Hajimoto Productions and made from ABS and Carbon Fiber for a strong and lightweight design. The barrel band is designed to sit at the end of the cylinder, as shown, and features a section of Picatinny rail on the bottom to accommodate the attachment of a bipod, flashlight, camera, or laser pointer. The Picatinny rail is not designed to support the entire air rifle in a clamp or tripod FOR standing rests.
This Barrel band is specifically designed for a Umarex Notos with our HubenPower Dream TK installed with our 300cc or 360cc carbon fiber bottle with a FX barrel installed.
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Sale!
NOTOS Barrel 1/2×20 Adapter Kit
NOTOS Barrel 1/2×20 Adapter Kit
Select options$70.00Original price was: $70.00.$60.00Current price is: $60.00.This is our barrel adapter kit that provides the Umarex Notos with a Barrel Shroud Adapter, A Barrel Adapter with 1/2 x 20 threads for a suppressor, and a thread protector cap.
This is the adapter that we provide if you pay us to modify your Notos Barrel for you.
Upgrade Your Notos: Add a moderator to your Notos with our NOTOS Barrel 1/2×20 Adapter Kit. This adapter kit enables you to attach your favorite moderator and enjoy quieter shooting. This kit requires the factory molded moderator to be removed in order to install our barrel adapter.
Key Features:
- Precision Machined: CNC-made from 6061 T6 Aluminum for accuracy and durability.
- Secure Fit: Diamond pattern knurling for easy grip and installation.
- Includes M4 Set Screws: Ensures a tight and secure connection.
- Easy Installation: Uses standard 2mm Allen keys.
- Sleek Finish: Black anodized for a durable and attractive appearance.
Here is a direct link to the Notos Barrel Modification Service if you would rather have us do the factory moderator removal, transfer port increase, and provide you with this NOTOS Barrel Adapter Kit.
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Notos Internal Porting
Notos Internal Porting
$75.00Select optionsNotos Internal Porting
This service provides increased airflow and efficiency of the internal pathways, resulting in more power capability.
This is what we do to our Haji-Notos Custom Builds, but you can have the same service performed on your Notos as well. The internal transfer ports are increased, that results in greater airflow producing more power. This service also includes a trigger to sear face polish to make the trigger a much smoother feel.
You ship us your complete Notos or just the action, with the stock and barrel removed, and we execute the service.
If you want to minimize shipping costs and you elect to ship just the action, follow the instructions below.
If you are shipping your complete Notos, ignore the instructions below and use your original Notos Box to ship your Notos.
- Notos Barrel Removal
Your Barrel is very easily removed by removing the 2.5mm button head screw on top of the Picatinny rail near the magazine opening. Once the 2.5mm screw is removed, there is a 2mm set screw below it that holds the barrel into the receiver block. Loosen the 2mm screw four revolutions and slide out the barrel.
Shipping
Shortly after you place your order for the service, we send you an order processing notification with a copy of your invoice. Shortly after that, you will receive a detailed notification with the shipping information to ship us your barrel/action/PCP for modification.
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Barrel Service Notos
Notos Barrel Service
$110.00Select optionsNotos Barrel Service
This is what we do to our Haji-Notos Custom Builds. but you can have the same service performed on your Notos barrel as well. The Transfer port work increases the port and polishes the opening to allow greater airflow to produce more power more efficiently.
You ship us your Notos Barrel and we execute the following:
- Remove the fixed molded plastic suppressor (the suppressor is destroyed in the process).
- Increase and polish the barrel transfer port.
- Two new barrel o-rings are provided.
- Clean up and polish the barrel crown.
- 1/2 x 20 UNF Threaded Adapter Included.
- Barrel Shroud End Cap and Barrel Guide Included.
- Thoroughly clean and silicone barrel bore.
Notos Barrel Removal
Your Barrel is very easily removed by removing the 2.5mm button head screw on top of the Picatinny rail near the magazine opening. Once the 2.5mm screw is removed, there is a 2mm set screw below it that holds the barrel into the receiver block. Loosen the 2mm screw four revolutions and slide out the barrel.
Shipping
When you place the order for the above-described service, we will send you an order processing notification with a copy of your invoice. Shortly after that, you will receive a detailed notification with the shipping information for you to ship us your barrel for modification.
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Sale!
The Haji-Notos Lab
Notos Services
Select options$1,000.00Original price was: $1,000.00.$735.00Current price is: $735.00.You ship us your Notos and you get back a complete Haji-Notos with all of the following modifications applied.
- Haji-Notos Power Plant Combo Installed. (includes .036L (360cc) 4500 psi Carbon fiber bottle)
- Buck Rail Grip Adapter Installed.
- Buffer Tube with Castle Nut, Grip, and Adjustable Butt Stock Installed.
- Stock suppressor removed and a 1/2 x 20 threaded adapter installed.
- Buck Rail Suppressor Installed.
- Barrel transfer port increased and polished.
- Barrel Crown Polished.
- Internal Valving and Port Modifications for Greater Power Production.
- Hammer spring upgrade.
- Trigger sear face polished and lubricated.
- Bottle to Barrel Support Band for rifle Rigidity.
- Externally adjustable regulator.
- Fiber Optic Sights Installed.
- One Hajimoto Productions Expanded Magazine (11 rounds)
Please note that the Expanded Magazine cannot be used with the Fiber Optic fixed sites because the magazine sits taller and blocks the rear to front site alignment. You can always use the stock smaller 7 shot magazine with the fiber optic sites.
Shortly after the order is placed, you will receive shipping instructions. The notification will provide you with the address and label details that the package must have to guarantee proper direction to the appropriate department. Once the PCP is received, an incoming inspection will be conducted, and the results will be shared with you for review and authorization to proceed.
The shipping cost associated with this service is a placeholder and may need to be adjusted depending on the actual package size and weight we receive.
All stock/old parts are included when the Notos is returned to you. Please only ship the Notos in its pistol configuration to save on package space and shipping costs.Typical turnaround times are 10 days or less once we receive authorization to proceed.



















