Notos Internal Porting - Hajimoto Productions LLC (2025)

Genuine Huben Power Dream-Notos TK mounted on a .30L (300cc) 0.36L (360CC) or .50L (500cc)

A complete Haji-Notos Power Plant Combo. It allows for precise power adjustment allowing the Notos to deliver only the power required for the situation. If you want to shoot pest birds in a barn or feed house, you can dial it back to fly pellets as low as 400 ft/s, or if you are hunting grey squirrels and want to deliver a JSB Hades 15.89 gr at over 750 ft/s you can do that too.

FEATURES

• Includes 0.30L, 0.36l or 0.50L 4500psi Carbon Fiber Bottle in Gloss or Matte Black.
• Optional Barrel Band support to provide structural support for the Power Plant.
• Extremely stable externally adjustable regulator Output 500psi~3600psi
• Provides over 130 shots.
• Ultra-stable output pressure
• Power Plenum with rotatable joint for perfect clocking, locked in place with set screws.
• Standard 8mm quick disconnect male foster fitting adapter for filling.
• Built-in Picatinny Rail Section for Bipod or Tripod Shooting.
• Power Increase on the fly but decrease requires degassing the plenum.

See details below

Notos 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.

Introducing the Haji-Notos 11 Shot Expanded Magazine!

This is an expanded magazine for the Umarex Notos PCP. The magazine is a brand-new design that loads from the right and employs a removable magnetic lid for easy loading. Allow for a smooth and consistent chambering of rounds without issue.

Please note that our design loads from the right.

Be sure to install and remove the mag at least 10 times before using it so that it breaks into your mag well.

The Haji-Notos magazine works with a red-dot or optic but does not work with Umarex fixed fiber optic sights.

LOADING THE NOTOS MAGAZINE

Hajimoto Productions Strip Stak Pak for the Gauntlet 1 or 2. Not compatible with the Gauntlet .30 Caliber.
An efficient multiport air stripper that strips and channels air away from the pellet to allow for a more stable and less turbulent pellet launch from the muzzle. The HP Air stripper 2.0 comes with an o-ring. The kit also provides variable baffle chambers to help remove both noise and turbulence in the air stream. The end result is a more laminar air stream which reduces projectile instability and as a secondary benefit, reduces the report of the rifle.

BAFFLES CAN NOT BE USED WITH DONNYFL SHORT SHROUD
Because the Short Shroud is cut at a length that is a perfect fit for the air stripper and the spring. There is not any room for the baffles in the DonnyFL Short Shroud.

Air Stripper comes with o-ring and silicone grease for installation.

Hajimoto Productions Tuning O-ring kit for the Gauntlet and Gauntlet 2

Now includes two of my “NO RING” pellet probe seals as HP-1 rather than the typical high wear donut orings.

I have put together the most common o-rings that fail during a tuning session. Most of the stock o-rings for the internals will gouge when the airgun is disassembled, this kit will allow you multiple attempts should any of the o-rings fail. Please note that the .30 caliber uses completely different internal o-rings than all previous Gauntlet Models including the .30 cal exclusive transfer port orings Which will be bagged as TP.

Some of the NO-Ring seals have the leading edge precision ground.

These tapered / precision ground types need to be installed as shown below

(Images are of the .30 caliber NO RING)

You get:

• 2 of pellet probe NO-ring seals.
• 2 sets of barrel o-rings.
• 2 sets of tank block o-rings.
• 2 of valve body o-rings.

Introducing a Hajimoto Productions Exclusive offer!

22ci/360cc/.36L Aluminum Tank 3000PSI
Newly redesigned unit
Now has a high pressure and low pressure burst discs!

Flex 22 Configuration For Generation 1 Gauntlet .177/.22 Cal
Stock .177/.22 | 3000/1100PSI Regulator
Flex 22 .177/.22 |3000/700 to 1500PSI

Flex 22 Configuration For Generation 1 Gauntlet .25 Cal
Stock .25 | 3000/1900PSI Regulator
Flex 22 .25 | 3000/1500 to 2300PSI

If you are looking to add an externally adjustable reg to your Gauntlet 2, take a look at swapping your current fixed reg to the Flex reg found HERE

Installs on the Gauntlet with minor tank shroud modifications. (The Gauntlet 2 is shown to give an idea of what modification needs to happen and that is simply a hole drilled in the bottom of the plastic tank shroud for the fill nipple.

A 22ci aluminum 3000PSI cylinder with externally adjustable Ninja Flex Reg for your Umarex Gauntlet1! The volume of air in these 22ci tanks over the 13ci is mind-blowing!

The diameter of the tank is 54-55mm across so a modification to the forearm is required on a Gauntlet 1. I do offer a tank shroud modification service for Gauntlet 1 owners that can be added to a build or provided as a mail-in service.

The Gauntlet 2 forearm slide right over without any issue. Only one access hole needs to be drilled so the fill port is accessible at the bottom.

Consider picking up our extended foster fill adapter to make coupling and filling a breeze.

The Power Flex Combo allows the user to externally adjust the regulator output pressure on the fly with an adjustment range of 800PSI!

When installing the Flex 22 on the Umarex Gauntlet. Tighten the degassed tank and regulator assembly fully to the rifle, then back it off until the fill port is on the bottom and the gauges are left and right. Now fill the bottle with air and all will tighten up solid. Proper alignment will be achieved before the 360° maximum rotation limit is realized.

Comes with a dedicated Spanner Wrench for power adjustment. MADE IN THE USA!

Because of practical limitations, regulator output will be +/- 50PSI (3.5bar) within the requested output.