Hajimoto Productions LLC

Stimulating, Innovating, and fabricating

News

COVID-19 and Hajimoto Productions

by Hajimoto

As we all know this virus is having a huge effect on business and inventories. Hajimoto Productions, while a design and production organization offers services and product which are indirectly affiliated with other business. There will be certain items that are temporarily unavailable due to my part distributors shutting down. That said, I will continue to offer products that I have in stock but will need to list them as OUT OF STOCK once I sell what I have.

Once this crisis is over and supply chains start to move again, I will quickly refill my inventory and offer a full product inventory once again. I wish all of you well and hope you and your loved ones stay healthy during this trying time.

Thank you,
Hajimoto

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2019/2020 Hajimoto Edition Gauntlet is retired.

by Hajimoto

A little while back I shared on social media and a few other outlets that the production cycle of the HE Gauntlet was complete. I never made an official announcement here on the Hajimoto Productions website though and this would be that post.

I would like to thank all of those that have supported this venture and I am proud knowing that all of you that have this limited edition has something very special.

I will of course be offering other limited edition in the future but I need to position the release in such a way that it does not misaglign with the next incoming wave of offerings by the manufacturers.

Thank you all again for your support,
Best Regards,
Hajimoto

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The Gauntlet gets Flexible Power!!

by Hajimoto

Announcing a major performance enhancement for your Umarex Gauntlet. The Flex Reg will allow you to on the fly adjust your output pressure either up or down by 800 to 1000PSI! Hajimoto Productions have configured the regulator in two flavors.

  1. For the .177/.22 Caliber Gauntlets pressure range adjusts from 500PSI to 1500PSI.
  2. For the .25 Caliber Gauntlet pressure range adjusts from 1400PSI to 2400PSI
The new Hajimoto Configured Flex Reg installed on a 100% stock Gauntlet

As you can see there are no modifications required to the stock. Both gauges are clearly visible and allow the user to adjust on the go to suit their needs based on the projectile being used.

These are radar results from the installation and adjusted Flex Reg on the .22 Caliber Gauntlet. Can you imagine what those number will look like after the STK is installed!!

A stock .22 caliber Gauntlet with the regulator set to its factory 1100 PSI will fly JSB 18.13 grain pellets at about 786 FT/S. Once the Flex Reg is installed and cranked up to the maximum of 1500PSI, the same 100% stock Gauntlet delivers the 18.13 Grain pellet at a whopping 900 FT/S!!!

The Flex Reg is available alone or mounted on the extra capacity 22ci tank for the best of both worlds, more power and more shots!

Get your yours today!!
https://hajimotoproductions.com/index.php/product/flex-reg-gauntlet/

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Gauntlet Transfer Port Talk

by Hajimoto

The purpose of porting, polishing, chamfering and bird mouthing air conveyance infrastructure is to reduce drag or pressure drop and inducing velocity stack. More efficient airflow to the projectile, in turn, increases projectile velocity.

Because velocity is increased, less hammer preload is required because the internals are delivering the air more efficiently which in turn, increases shot count.
The key and most important thing to remember is that the transfer port outlet inside the barrel should never exceed 80% of the bore diameter. This only because when loading a pellet into the breech anything larger than 80% tends to grab the projectile and gouge or deform it.

The projectile will try and load into the transfer port if the transfer port is too large.

The key is to taper and smooth like a funnel towards the chamber. Bird mouth the inlet side of the transfer port in the barrel so it is larger than the outlet side of the barrel again funneling the air rather than fighting a sharp 90° transfer of direction and creating jetties or vertices that essentially reduce the flow by upwards of 50% (See attached sketch).

Just like in engine building, anything you can do to help an aspirating system loose drag or pressure drop is an improvement in performance.

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GREEN LIGHT! Orders Being Accepted Again.

by Hajimoto

Hello Airheads!!
 I have pushed through and caught up to order requests. So I and am lifting the moratorium on accepting new orders. Thank you once again for hanging in there with me as I get through the hunting and Christmas rush. Please note guys and girls that the 2019 Hajimoto Edition Gauntlet is sold out and will not return. I will work on another color scheme and version but that limited edition version has been retired. Those of you that have one will have comfort knowing you have one of a very limited production series and I thank you for allowing me to build it for you.
I will still be offering completely modded and tuned Gauntlets which can have all the features and functionality of the HE just not the color scheme.

Thank you and be safe!
Hajimoto

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Umarex is making changes and for the better!

by Hajimoto

As most of you know I am a huge fan of the entry-level PCP known as the Umarex Gauntlet which comes in .177, .22 and .25 calibers. I have been pretty vocal to Umarex regarding the issues that Gauntlet has which could be addressed relatively easily and not really incur any additional machining/fabrication time to correct. The issue is that there are thousands of these parts that are already rolling off the line and an introduction into an already rolling production line will cause a huge ripple effect in delivering the product on time.

So as with most manufacturers, the product will go through generational upgrades and changes over time. Well, some of the comments that folks have made are finding their way to the generational evolution of the Gauntlet. Some of the main issues with the Gauntlet were:
Weak Barrel Support
Cracked Air Strippers
Difficulty Cocking

The poor barrel stiffness issue caused huge point of impact changes with only slight physical contact with the barrel shroud was made. The POI issue was solved by the community with things like barrel bands, woodblocks and other ingenious ways to support the barrel shroud. I offered a barrel band which introduced additional support from the bottle to the barrel shroud, Well Umarex picked up on this issue and quickly designed an integrated barrel shroud support system that attached to the bottle block. This barrel shroud support that is being included on the then new .25 Caliber, was promised to previous Gauntlet owners as a part that would eventually be available. It was also said that this new improvement would be included on any fractional generation .177/.22 caliber Gauntlets produced.

The Umarex Gauntlet barrel shroud support on the .25 worked really well and folks were banging Umrarex's doors down to be able to add this to their .177/.22 Gauntlets. The addition of the support required some drilling and mechanical fastening which could be installed improperly and cause additional issues that the manufacturer was not ready to accept. So after a few 30 or parts were sold the support line was lit up with calls of installer error or difficulty installing the part. Umarex quickly stopped offering the part and offered the support as a service that they would perform and send the rifle back to the shooter. As you can imagine this additional shipping back and forth made the shipping companies a lot of money and also put the airgun owner in a position where they were without their beloved Gauntlet for a week or more plus the shipping cost.

Well as I stated earlier, the factory is retrofitting existing stock with the upgrades like
Barrel Shroud Support.
Beefer Air Stripper.
Better fitting o-ring on Air Stripper.
Stronger screws at the bottle block.

I know this because, in one of my recent airgun orders of 12 rifles, all the .22 caliber versions were upgraded. Take a look at the photos here and you will see that they are hard at work to improve the Gauntlet for the end-user and this is awesome to see. The images I provided are of a .22 caliber and show the improvements that were made to an existing stock rifle, the reason I know this is that the star washer imprints in the pressure tube are clearly visible. I also have erased the last digits of the serial number as this will be in the hands of a customer at some point and I do not what their serial number used by some unscrupulous characters that may exist out there ?
I will continue to report changes as I discover them and will try my best to field any questions you may have.
Be Safe!
Hajimoto

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UMAREX GAUNTLET REGULATOR CHANGES

by Hajimoto
Notice how much longer the Chinese regulator is

I have noticed this for months but never really thought about writing an article about it until today. I have been sent several emails and have read in the forums about folks not needing to cut the forestock to install my HP Barrel Band. On previous Gauntlet models, it was required that the forestock be trimmed about 13mm or so to allow the band to fit on the tank without pressing against the forestock.

At some point in production, Umarex decided to use another regulator manufacturer other than Ninja. I noticed these non Ninja regulators on the, at the time new, .25 caliber Gauntlets.
I noticed then that they were about 13mm or so longer than the Ninja versions.

This new regulator being longer means there really is not a need to trim the forestock on the Gauntlet in order to fit the HP Barrel Band. As you can see in the photos, the non-Ninja regulator is much longer.

I have no idea how you would be able to determine if you will receive the Ninja version or the new one other than when you open the box and see for the first time.

So for any of you potential HP Barrel Band installers out there, if you have the newer regulator, your installation just became a whole lot simpler and most importantly to the average shooter, the warranty stays intact!

Lastly, even though these regulator styles are different, it has been my experience that they both accept the same shims. I have noticed the new version regulators are more sensitive to shim thickness than the Ninja regulators. IE; it seems to take less shim to achieve the same amount of increase. But the important thing is my shim kit will work in either.

Work and shoot safe!

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Umarex is making changes!

by Hajimoto

As most of you know I am a huge fan of the entry-level PCP known as the Umarex Gauntlet which comes in .177, .22 and .25 calibers. I have been pretty vocal to Umarex regarding the issues that Gauntlet has which could be addressed relatively easily and not really incur any additional machining/fabrication time to correct. The issue is that there are thousands of these parts that are already rolling off the line and an introduction into an already rolling production line will cause a huge ripple effect in delivering the product on time.

So as with most manufacturers, the product will go through generational upgrades and changes over time. Well, some of the comments that folks have made are finding their way to the generational evolution of the Gauntlet. Some of the main issues with the Gauntlet were:

  • Weak Barrel Support
  • Cracked Air Strippers
  • Difficulty Cocking

The poor barrel stiffness issue caused huge point of impact changes with only slight physical contact with the barrel shroud was made. The POI issue was solved by the community with things like barrel bands, woodblocks and other ingenious ways to support the barrel shroud. I offered a barrel band which introduced additional support from the bottle to the barrel shroud, Well Umarex picked up on this issue and quickly designed an integrated barrel shroud support system that attached to the bottle block. This barrel shroud support that is being included on the then new .25 Caliber, was promised to previous Gauntlet owners as a part that would eventually be available. It was also said that this new improvement would be included on any fractional generation .177/.22 caliber Gauntlets produced.

The Umarex Gauntlet barrel shroud support on the .25 worked well and folks were banging Umarex's doors down to be able to add this to their .177/.22 Gauntlets. The addition of the support required some drilling and mechanical fastening which could be installed improperly and cause additional issues that the manufacturer was not ready to accept. So, after a few 30 or parts were sold the support line was lit up with calls of installer error or difficulty installing the part. Umarex quickly stopped offering the part and offered the support as a service that they would perform and send the rifle back to the shooter. As you can imagine this additional shipping back and forth made the shipping companies a lot of money and put the airgun owner in a position where they were without their beloved Gauntlet for a week or more plus the shipping cost.

Well as I stated earlier, the factory is retrofitting existing stock with the upgrades like:

  • Barrel Shroud Support.
  • Beefier Air Stripper.
  • Better fitting O-ring on Air Stripper.
  • Stronger screws at the bottle block.

I know this because, in one of my recent airgun orders of 12 rifles, all the .22 caliber versions were upgraded. Look at the photos here and you will see that they are hard at work to improve the Gauntlet for the end-user and this is awesome to see. The images I provided are of a .22 caliber and show the improvements that were made to an existing stock rifle, the reason I know this is that the star washer imprints in the pressure tube are clearly visible. I also have erased the last digits of the serial number as this will be in the hands of a customer at some point and I do not what their serial number used by some unscrupulous characters that may exist out there ?
I will continue to report changes as I discover them and will try my best to field any questions you may have.
Be Safe!
Hajimoto

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GREEN LIGHT!

by Hajimoto

Hello my air gun friends!
Today I am announcing that the Hajimoto Productions moratorium has been lifted! I have worked very hard to get all the tunes, builds and custom orders out the door. I have also replenished all the parts and add-on that where wiped out from the hunting season rush.

As I have explained before and just to be clear, I do not entertain backorders. It has been my practice to open or close sales acceptance based on workload. If I have so much work that delivery times exceed my 15-day maximum turnaround time, I hit the pause button. My logic is, if I am having a hard time managing the current flow, why start a line of waiting customers that can wait upwards to weeks just to be in another line to get their orders processed. I operate by the first come, first served rule.

I would like to thank you all for your patience during these times of RED LIGHT.

Hajimoto

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SOLD OUT!

by Hajimoto

Hey guys! As you know over the past 1.5 months or so I have been hit hard by tuning requests and sales of tuned Gauntlets. As I posted a week or so ago, I place a moratorium on taking any additional orders until I got caught up. Well since that time, almost every mod I produce has been sold out.

So I apologize if almost every item you try to place in you rcart pops up as "SOLD OUT" but I am working diligently working to get those inventories back on line and open the gates once more.

I will be restocked and ready to receive orders for airguns, tunes and parts on Monday 10/12/2019. I will make another post to the news once I have things ready to go.

Thank you for your support and understanding,

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