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For G1 G2 & G30 Variants
Umarex Gauntlet Tune O-ring Kit
$11.00 – $20.00Price range: $11.00 through $20.00Select optionsHajimoto 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!
Stock Umarex Magazine
Umarex Gauntlet Rotary Magazine
Select options$17.95Original price was: $17.95.$14.00Current 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
- .22 = 10 shots
- .25 = 8 shots
- .30 = 7 shots
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For Gauntlet .177, .22, .25 and .30 Calibers
Hajimoto’s Gauntlet Expanded Magazine
Rated 4.00 out of 5$35.00 – $40.00Price range: $35.00 through $40.00Select optionsNow 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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Sale!
HP Stak Pak for Hatsan QE
Rated 5.00 out of 5Select options$39.99Original price was: $39.99.$35.00Current price is: $35.00.Stak Pak for Hatsan QE shrouds (.357, .457, or QE screwed in place open sights Not Included)
Unscrew your shroud end cap, remove the two felt-covered stock baffle assemblies, remove the two aluminum stand-off chambers, and install the Hajimoto Stak Pak. No tools, no modifications, just a simple one-for-one swap! Some model Hatsans will use all the baffles others will need one less full-sized baffle, be sure to use both shorter baffles and leave out the full-sized one. If you need to leave one out, leave out the first full-sized baffle and then arrange the stack as shown in the packaging.
A ten-piece kit that directly replaces the two hair curler style baffles inside any Hatsan with a QE shroud system, excluding .357 & .457 models. The bundle has nine baffle chambers to help remove noise and turbulence in the air stream. The baffle stack rides on a high-tension compression spring allowing for a perfect fit for any Hatsan QE PCP, excluding .357, .457, and models with the fixed sight on the QE swell that are screwed into an internal ring.
The result is a more laminar air stream which reduces projectile instability and substantially changes the sound of the report of the rifle. This kit is 100% compatible with the stock end cap or the DonnyFL A24 adapter.
If your QE shroud has a fixed sight that is screwed to a ring that is inside the QE swell section of the shroud, you cannot use the HP STAK PAK.
Installation video is listed in the DESCRIPTION section below
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Hajimoto Tune My Gauntlet G1 or G2
$625.00Select optionsWe completely tune your supplied Gauntlet 1 or 2 NON SL Version, which includes everything listed in the section below.
The service includes a very detailed and time-consuming incoming inspection report that includes photos and other relevant information that detail the condition of the airgun and all of its pieces and parts. This report is provided to you and you must be reviewed and authorized in order for the work to continue.
Ordering procedures:
- Add all services and items to your cart.
- Be sure to use the notes section to communicate any known issues or special instructions.
- Check out.
Shortly after the order is received, you will receive an email notification containing shipping information that will include labeling and packaging requirements.
To better understand how the Gauntlet is transformed from a static you get what you get type of airgun, into an adjustable power and tunable PCP, take a look at this video that demonstrates how the power adjuster works if you should want to increase or decrease the power output for any given ammunition in order to get it to fly at the best rate of travel for that particular ammunition.
HOW TO ADJUST POWER WITH STKWe will build your order based on the information provided from the questionnaire as well as any specific requests, and before the airgun ships, any credits or additional charges will be settled.













