Description
This service is labor only and is the shop’s minimum fee. Parts and shipping sold separately.
$50.00
This service is labor only and is the shop’s minimum fee. Parts and shipping sold separately.
This service is labor only and is the shop’s minimum fee. Parts and shipping sold separately.
You must be logged in to post a review.
This service is to modify the bottle shroud to allow the proper fit for the Power Flex Combo carbon fiber tank and flex regulator:

The service can be added to an existing tune/build or a stand-alone ship in service. If you are shipping me your forestock or bottle shroud be sure to keep the screws, star washers, and sling stud as I will not need those. If you have any type of rail installed for a bipod it needs to be removed prior to shipping me the bottle shroud.
If you select the stand-alone ship service, shipping instructions will follow which detail the packaging and address to ship to.
Cerakote or color change is not included photo is from the 2021 Hajimoto Edition for illustration purposes.
Installation of our Sidelever on G2 or G1
This service is for the installation of our sidelever cocking system installed in your action. The Sidelever is no longer being offered for .30 caliber variants.
Our side lever system eliminates one of the main gripes folks have with the Umarex Gauntlet and that is COCKING EFFORT!
There is no comparison in cocking effort when you apply the mechanical advantage a sidelever gives you. The installation is a non-destructive installation and can be reversed without any compromise to the airgun’s action or stock.
The sidelever system is a CNC milled 6061 Aluminum part which is hard anodized for a great match to the existing Gauntlet finish. The cocking vertical handle is an additive manufactured carbon fiber & ABS part that can be swapped out by you if you wanted to use a custom handle from wood or other material.
Our sidelever cocking system does require that you hold the handle back to swap mags but there is no need to hold back if you single load using the single shot tray.
One of the most common questions we get is “Can I just buy the parts and install them myself?” and the short answer is, no you cannot. For the reasons why, please read the ARTICLE we published in our blog in February 2023 on this topic.
See below for detailed shipping instructions and preparation videos.
Regulator Service or Pressure Change
This is a service to repair, test, leak test, adjust or increase the output pressure of a Umarex Gauntlet 1 or 2, regulator to a customer’s requested output. The regulator will be tested and calibrated to within +/- 75 PSI. Parts such as Gauges, Burst discs, Bonnets, Pistons, Caps, or Regulator bodies are not included. If parts are determined to be required to repair the regulator, pricing will be determined, quoted, and will need to be paid prior to the return of the regulator.
Please note that if you have a Taiwan-produced regulator, which is the regulator that is located at the top of the photo, there are very limited corrections that can be made to these units, and you may end up needing a new regulator. Please use the notes area to provide the Generation and caliber of the rifle. Also, give as much detail as possible of the issue or the requested pressure output, and so forth.
I wrote an article on the regulator change back in 2019, read all about HERE
Once the order is physically reviewed, you will receive a second notification with details associated with packaging and shipping the items in for service.
When you place the order for the above-described service, you will receive an order processing notification. Shortly after that, you will receive a detailed notification with the shipping information for you to ship us your regulator or regulator and tank assembly.
This service is not a hydro test of the tank/bottle and is focused only on the regulator’s functionality and visual inspection assemblies.
Please note that this service is not associated with any manufacturer’s warranty, so please be sure to exhaust all warranty options prior to sending us your regulator for service as our working on the part voids any manufacturer-provided warranties.
Copyright All rights reserved Hajimoto Productions LLC 2026
Proudly powered by WordPress . Theme: multipurpose shop by eDataStyle.All products offered on our website are intended for airgun use only. Federal law prohibits using a product in any way not consistent with its intended use. It is the purchaser's responsibility to know and comply with all applicable state, county, and local laws and ordinances. Dismiss
flyingwfsw –
Hey can I ship my unused brand new gauntlet to be modified and tuned and how do i do that
Hajimoto –
The best place to start is to look at and familiarize yourself with what services I offer from a package sense of the word.
There are detailed descriptions associated with each of them