Gauntlet Tuning Items

Here you will find all of our tuning and repair items for all generations of the Umarex Gauntlet including services.

50 to 250
For either G30 or G30SL
G30 Barrel Service Lab
50 to 250
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$7.00
Gauntlet Barrel Baffle Spring
Umarex Gauntlet Baffle Spring
$7.00

Umarex Gauntlet .177, .22, or .25 Baffle Spring.

Part is not compatible with Gauntlet .30 Caliber

This is the spring that lives in your Gauntlets Shroud. It is required to keep the air stripper on the end of the barrel and allows the baffle or baffle stack to live under tension.

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$11.00 – $20.00
For G1 G2 & G30 Variants
Umarex Gauntlet Tune O-ring Kit
$11.00 – $20.00
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.
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Sale!
Original price was: $17.95.Current price is: $14.00.
Stock Umarex Magazine
Umarex Gauntlet Rotary Magazine
Original price was: $17.95.Current price is: $14.00.
The Gauntlet Rotary Magazine advances each pellet with the operation of the bolt on the Umarex Gauntlet PCP air rifle.

Features
- .177 = 12 shots
- .22 = 10 shots
- .25 = 8 shots
- .30 = 7 shots
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$18.50
Umarex Gauntlet Regulator Shim Pak
$18.50
Hajimoto Productions Regulator Shim Kit For Umarex Gauntlet

I have put together a very easy and complete stainless steel shim kit so you can adjust your Gauntlets Regulator output. The shims that I have included give you a wide range of adjustability to mix and match different thicknesses to get the regulator to output exactly what you want. The shim kit comes with easy to follow instructions which guide you through the process as to what shims you need to add to typically achieve my recommendations for each Gauntlet Caliber.

The shim kit contains:
- 2 – #5 Shims.
- 1 – #3 Shim.
- 2 – #2 Shims.
  (Two #2’s = One #4 | Two #5’s = One #10 | One #5 + One #3 = One #8, and so on)
To take a stock G1 .177/.22 from the stock 1100-1050PSI to my recommended 1350-1400PSI you would add two (2) #5 shims (10).
To take a stock G1 .25 from the stock 1900-1950PSI to my recommended 2100-2200PSI you would add one (1) #3 shim (3).
The included two #2 shims are for minor adjustments if you have a finicky regulator.

DETAILED LESSON/EXAMPLE:
Let’s say your .22 Gauntlets regulator only puts out 1300PSI after installing the two #5’s when it should be 1350 to 1400PSI, you would add one #2 for a total of 12 to help get it there. If after the addition of the one #2, you’re still 50psi short so you would pull out the #2 and use the #3 for a total of 13.

Always use a regulator output tester to confirm the output pressure of your regulator. It is the only safe and sure way to properly adjust the pressure of your regulator.

You have to fill and purge so the Belleville washers settle into the new preload. Be sure to slow fill your bottle the first time only to 500PSI and then purge it, fill slowly a second time to 1000, and then purge fill the final time slowly and watch to be sure the reg has settled and does not exceed your target pressure. If it does exceed your target pressure, stop filling, purge and shim less.

If you rapid fill, there is a good chance you will pop your burst disc.
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$20.00
HP Baffle Stack For Umarex Gauntlet
Rated 5.00 out of 5
$20.00

Part fits either the original Gauntlet or the Gauntlet 2

THESE BAFFLES CANNOT BE USED INSIDE THE DONNYFL SHORT SHROUD.

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$23.00
AR Pistol Grip
Magpul Beaver Tail Grip
$23.00

A2 Pistol Grip – Features a textured surface for a secure and non-slip grip, even in wet or slippery conditions. Provides a comfortable hold, reducing fatigue and ensuring a more accurate shot placement.

Material: Dupont Zytel 30% glass filled nylon

Made in the USA

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Sale!
$25.00 – $35.00
Includes G1, G2, G30, G2SL, & G30SL variants
HP Barrel Band For Umarex Gauntlet
Rated 4.67 out of 5
$25.00 – $35.00

Available in the classic Picatinny rail version or the 15mm thick rail less version.

Versions for Gauntlet 1, Gauntlet 2, Gauntlet 30 as well as the SL Versions!

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Sale!
$30 to $1000
Gauntlet 30 SERVICE Builder
$30 to $1000
Hajimoto Productions Gauntlet .30 Service Selector/Builder

Important Information:
This builder is used for G30 OWNERS who understand that they will be sending in their G30 to have modifications performed. If you are looking to purchase any of the parts listed below, you will want to leave SERVICE and use the SEARCH for the PART you want.

So you didn’t know we offered turnkey G30 packages? So you already own a G30 and wish you could get were able to have some of the service modifications that are available on some of our Airgun Packages? Well, we got you covered with this G30 specific Service Builder.

This menu system allows you to select only what you want. When you’re done selecting, you add to cart and checkout. In the end you have a complete turnkey service request for your Gauntlet .30 Caliber!
- The Gauntlet 30 Caliber
  Shortly after your order is received, we will respond with the shipping information as well as what your shipping label needs to contain.
The shipping you pay at checkout is only a placeholder and the actual shipping fees associated with this order will be adjusted so that you only pay what is required once we receive your package and calculate the actual size and weight of your package. In some cases, you will be required to pay more and in others, you will receive a refund.

Please note that this service is exempt from any discount campaigns.
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$28.00
Adjustable Butt Stock
Butt Stock
$28.00

Buttstock Assembly, 6 Position, Mil Spec, Carbine, Black

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$30.00
Intended for higher power builds
High Travel Valve Stop For Umarex Gauntlet 1 or 2
$30.00

This part replaces part #19 and allows for greater valve dwell producing more power to be produced at higher regulator pressure settings.

The .22 caliber HTVS for the Generation 1 Gauntlet fits both the .177 and .22. Do not order Generation 1 HTVS for the Generation 2 Gauntlet, they are not the same

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$30.00
Small 13ci (213cc) 3000psi
13ci 3K PSI TANK
$30.00

A 3000psi 13ci (213cc) aluminum paintball style tank.
This is an industry standard 5/8″- 18 threaded bottle with a flat bottom.

This is the same bottle installed on the Original Gauntlet 1 in .177, .22 or .25 caliber PCP as shown below.

Airgun is not included

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$33.00
Gauntlet Mini Magazine
HP Gauntlet Mini Mag
$33.00
Introducing the HP Mini Magazine.

The old lidless design is being phased out. As inventory is exhausted, we will switch to the new magnetic lid style, as shown for the .177 and.22 caliber versions.

Fits all generations of Gauntlet

New Magnetic Lid Design! Smooth and reliable magazine that is shorter to allow a fit under your optic without the need to adjust or swap out your scope rings.

The HP Mini magazine is designed to fit the Umarex Gauntlet 1 or 2 in .177, .22, and .25 caliber. It extends your capabilities by increasing the number of shots before requiring a reload.

The stands only 40.90mm (1.610″)

This fits under high-scope rings and some medium-scope rings. Your scope may need to be moved forward or back to clear the turret bell.

Features
- An easy to load.
- Easy partial fill design.
- .177 = 16 shots.
- .22 = 13 shots
- .25 = 11 shots
- The magazine height is 40.90mm (1.610″ )
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$35.00 – $40.00
For Gauntlet .177, .22, .25 and .30 Calibers
Hajimoto’s Gauntlet Expanded Magazine
Rated 4.00 out of 5
$35.00 – $40.00
Now offering two designs. The original NO LOD and the new magnetic removable HP 2.0 design allows for much faster loading.

Here is a high-quality, high-capacity magazine designed to fit the Umarex Gauntlet 1 or 2 in .177, .22, and .25 calibers. This magazine extends your capabilities by increasing the number of shots before requiring a reload. Please remember we stock adjustable height scope rings by WestHunter, EagleVision, and FX, be sure to snag a set if you are worried about clearance issues plus adjustable rings allow you to keep your scope optically center leaving all the turret adjustment-free to use when you need it.

The NO LID design means you simply rotate the projectile carousel and drop in each round. There is no need to preload the spring, you are winding the spring during the loading process. This fits under high-scope rings and some medium-scope rings. Your scope may need to be moved forward or back to clear the turret bell

Features
- An easy to load NO LID design or the new magnetic lidded version.
- No pre-winding is necessary.
- Easy partial fill design.
- .177 – 21 shots which is an increase of 110% more shots over the stock magazine!
- .22 = 17 shots which is an increase of 70% more shots over the stock magazine!
- .25 = 15 shots which is an increase of 37.5% more shots over the stock magazine!
- .30 = 11 shots which is an increase of 57.5% more shots over the stock magazine!
- The magazine height for the .177, .22 and .25 is 50.25MM (1.978″)
- The magazine height for the .30 is 46.20MM (1.820″) Max Slug/Pellet length supported 11.20mm (0.441″)
WATCH THE VIDEO BELOW ON HOW TO LOAD MAGAZINE
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$45.00
for .177, .22 and .25 NOT .30
Umarex Gauntlet Strip Stak Pak (Bundle)
$45.00

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.

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Sale!
Original price was: $65.00.Current price is: $45.00.
AR Stock Folder
Side Folding Stock Adapter
Original price was: $65.00.Current price is: $45.00.
A basic affordable stock folding adapter that allows your PCP to take up 30% less space in your bag or back pak. This basic folder is an excellent choice for anyone looking to improve the versatility and portability of their tactical style PCP.

FEATURES
- Aerospace grade aluminum. Matte Black Anodized finish.
- Modifiable for pass-through for hammer adjusters.
- Designed to fold to the left but can be made to fold right as well.
- Locks in the open and closed positions*.
- Compatible with AR15 and AR308 extension tubes.
- Works perfectly for the HajiNotos and Tactical Gauntlet Kits.
(* The hinge does have a certain amount of play when locked in either position.)
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$50.00
Reg Pressure Tester
HubenPower Regulator Tester
$50.00
High quality HubenPower reg tester.

Features
- Micro threaded activation knob.
- Built in quick action pressure relief knob.
- High pressure gauge to 6000 psi.
Don’t guess what the output of your Gauntlets regulator is, KNOW what it is especially if you are adding shims and need to hit a specific PSI output.

Designed to be used with any Paintball style Regulator that uses the industry-standard G1/2-14 Threads like those shown below.
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$50.00
For G30, G30SL or Any Gen Gauntlet
Gauntlet Barrel Chambering Correction
$50.00

Service to correct the Gauntlet series of PCP’s. Calibers include .177, .22, 25, 30, or the 30SL, hard chambering of slugs issues.

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$50.00
For all G barrels in all calibers
G Barrel Transfer Port Work
$50.00

Service to improve the barrels transfer port by enlarging and polishing the inlet. All calibers benefit from this service when trying to achieve maximum power and efficiency from your build.

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Sale!
Original price was: $129.00.Current price is: $50.00.
AR Stock Folder Style #2
Side Folding Stock Adapter #2
Original price was: $129.00.Current price is: $50.00.
A robust and reliable stock folding adapter that allows your PCP to take up 30% less space in your bag or back pak. This style #2 folder is an excellent choice for anyone looking to improve the versatility and portability of their tactical style PCP.

FEATURES
- Aerospace grade aluminum. Matte Black Anodized finish.
- Low hinge stays out of the way when charging the weapon
- Adjustable hinge tension
- Set screw to prevent adapter loosening from receiver
- Quick detach sling attachment point
- Tool-less bolt carrier extension
- Adds about 1.7” length of pull
- Includes installation tool
- Works perfectly for the HajiNotos and Tactical Gauntlet Kits.
(* Much tighter tolerances than style #1 folder)
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$55.00
Trigger work
$55.00

The service can be added to an existing tune/build or a stand-alone ship in service. If you are shipping me your trigger group, you simply decock and degas the Gauntlet, remove it from the stock, and remove the two fasteners that hold the group to the bottom of the pressure tube.

If you elect the stand-alone ship service, shipping instructions will follow which detail the packaging and address to ship to.

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$59.99
Clamp with Pic rail
Saber Tactical 55mm Clamp
$59.99

If you’re uneasy about drilling into your factory gun stock, this 52mm bottle clamp will easily attach to your 52mm carbon fiber or aluminum bottles. It has rubber pads on the inside to prevent any marring to your bottle.

Fits perfectly for Umarex Gauntlets Stock tanks.

This clamp has picatinny rails at the bottom for you to connect your preferred picatinny accessories.

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$60.00
for .177, .22 and .25 NOT .30
Umarex Gauntlet Short Shroud with 1/2 x 20 Adapter
Rated 5.00 out of 5
$60.00

Part fits Umarex Gauntlet 177, .22 or .25. Not compatible with the Gauntlet .30 Caliber.

This part is designed and manufactured by DonnyFL

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Sold out!
$60.00
Adjustable Butt Stock
Hogue Butt Stock
$60.00

SPECS
• Precision fit for military specification buffer tubes (diameter = 1.15″ / length = 7.25″)
• Material: OverMolded^® rubber / reinforced polymer
• Color: Black

FEATURES
• Perfect compatibility with Hogue OverMolded grips and forends
• Light-weight skeletonized reinforced polymer construction
• Anti-rattle and beard-safe design
• Collapses to user’s preferred shoulder position
• Polymer cap provides snag-free shouldering
• Rubber/polymer hybrid butt pad cushions recoil
• Multiple swivel sleeve and sling mounting positions

Read more
$70.00
Install Super Tune Kit
$70.00

Please note that these are services to your rifle and not just the parts. If your looking for parts only head to the PRODUCTS section of the website.

The service of installing the Super Tune Kit does not include shipping. Return shipping will be calculated and added at check out. Shipping cost will be based on a complete rifle sent to Hajimoto Productions in the original box and packing materials. Stock modification is part of the STK install which is why you need to send the entire rifle to us not just the action. If the rifle is received in something heavier than the typical 14lbs, additional shipping costs will need to be paid prior to the rifle being shipped back to the customer.

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Sale!
$75.00 – $93.00
Gauntlet STK
Super Tune Kit (STK) for Gauntlet 1 and 2
Rated 5.00 out of 5
$75.00 – $93.00
THIS ITEM IS NOT DESIGNED FOR THE GAUNTLET 30
IT HAS ITS OWN HAMMER PRELOAD ADJUSTER STOCK

The single largest performance increase modification item for the Gauntlet. The Super Tune Kit allows complete power adjustment which opens all the possibilities of lower or higher foot-pounds (FPE) of energy for whatever the user desires. Do you need only 5FPE no problem back off the adjustment using a 5/64″ allen wrench and you are only delivering 5FPE and will realize over 200 shots on a stock bottle fill of 3000PSI!

Want 27-30FPE for dropping that 20lb trash bandit, no problem, crank up the adjuster using a 5/64″ allen wrench and you instantly have the power necessary for either long range or high energy delivery on target. The use of a chronograph is required in order to know what the rate of travel is of the projectile. (Power examples given are the .22 caliber version Gauntlet 1)

For the Gauntlet 1 and Gauntlet 2. Be sure to select the proper generation as there is a difference and improperly selected kits are not returnable.
BE SURE TO SELECT THE CORRECT GENERATION GAUNTLET

CONTENTS:
- Adjuster Plug Assembly.
- Smaller, Lighter Composite Poppet.
- Hajimoto Hammer Spring (Black Long)
- Lighter Trigger Spring (Bright Small).
- 5/64″ Allen Wrench For Adjusting Power.
The single largest performance increase modification item is available for the Gauntlet 1 and Gauntlet 2.
Consider adding the o-ring kit so you have all that you need should one of the factory o-rings get damaged during the kit installation, see option below.

Be sure to follow my written instructions in the document below.
Use the video to install but follow these written instructions to adjust and tune the STK:

Written Detailed Tuning Instructions for the STK

More details below.
Always read the content below because any revised instructions, video, photos, or other links will be there.
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$110.00
Fits the G1, G2/G2SL or G30/G30SL
Real 2 Stage Trigger for the Gauntlet
Rated 5.00 out of 5
$110.00
Full-fledged 2-stage trigger for the Umarex Gauntlet 1, 2, G30, bolt or sidelever variants. This trigger is a direct replacement for the single-stage trigger that ships with the Umarex Gauntlet. This trigger is a straightforward install that will increase the accuracy of your shooting due to a more predictable and consistent breakpoint.
- The Trigger Is Stainless Steel 17-4 Through Hardened
- The Trigger Shoe Is Aluminum 6061-T6
Please see the installation video below for more details.

Super Tune Kit Users
You must use the stock trigger return spring with the two-stage trigger as the trigger spring that comes with the Super Tune Kit is too light to be effective with the two-stage trigger.
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$110.00
For G30 and G30SL
G30 Barrel Shorten and Recrown
$110.00
Service to reduce barrel length removing the barrel choke making the barrel better for slugs. Service

The service executes the following:
- Reduce barrel length by 2.5″ to remove the choke.
- Recrown barrel.
- We provide a new shorter replacement barrel shroud.
This can be added to a custom build order or a send-in modification request. Customers who wish to send in their barrel for service can ship either the entire rifle or just the barrel, barrel shroud, and end cap. The barrel will be heavily cleaned and coated with silicone oil to protect the surfaces for the trip home.

Once the order is received, a follow-up email will be provided. Depending on the service request, the response will contain detailed shipping instructions, including the shipping address and other pertinent information required on the label for the service request being shipped to us.
This service price does not include shipping or parts. Shipping costs to return your PCP or PCP parts will need to be calculated and communicated to you before the order ships back.

The reduction of an airgun barrel typically results in a decreased rate of travel of 15-20 ft/s per inch.

Any outstanding balance must be paid before we ship out the service order.
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$130.00 – $215.00
for .177, .22 and .25 NOT .30
Gauntlet Short Shroud Combo
$130.00 – $215.00
This part is designed and manufactured by DonnyFL for airgun use only

Part fits Gauntlet .177, 22 or the .25 caliber but does NOT fit the Gauntlet .30 caliber

Stock baffle spring must be used!
Remember to always order your suppressor one size larger for shrouded barrel PCP’s. DonnyFL Suppressors are sized so the first number is your PCP’s actual caliber and the second number is one size up. So if you owned a .22 caliber Gauntlet, the size you would select is .22/.25. If you had a .25 you would choose the .25/.30.

If Your Gauntlet is:
- .177 Get a .177/.22 Supressor
- .22 Get a .22/.25 Supressor
- .25 Get a .25/.30 Supressor
Get it?
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138 to 338
Build your own Tactical Gauntlet Kit
Gauntlet Tactical Combo Builder
138 to 338

Gauntlet Tactical Builder!

If you just want the Tactical Grip Adapter Product Page, Click HERE

You select the parts you wish to add to your existing Gauntlet 1, Gauntlet 2, or Gauntlet 30 to convert it to a lightweight Tactical tack driver.

The builder starts with the Grip Adapter, fore grip, and included pistol grip.

Installation video is listed below

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Sale!
Original price was: $220.00.Current price is: $195.00.
Installation of our Sidelever on G2 or G1
Gauntlet Sidelever Install
Original price was: $220.00.Current price is: $195.00.

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.

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Hajimoto Productions Gauntlet .30 Service Selector/Builder

Introducing the HP Mini Magazine.

This part is designed and manufactured by DonnyFL for airgun use only

Gauntlet Tactical Builder!

Installation video is listed below