Huben GK1 in .22 or .25?

[rootdude]

Option #3: Get both.

GTO pellets for either caliber. JTS .22 (25.39) grain were almost as accurate as the GTOs. H&N .22 (14.6 gr. 5.53 head size) also shot good.

If you have the cabbage, this is ALWAYS the best option.

MOAR Hubens.

Standard, Shorty, Super Shorty...

 

[Michael]

MIchael a reflex sight is the only way to go, but going to the rail adaptor you chose sets the sight height too high above the barrel. This sets up the requirement to hold over the target at close range. I tried several different reflex sights and mounts and I now use a reflex sight that has a 2mm dot and 12 different intensity settings. I found this best for all light conditions. I also use an adaptor that converts the 11mm rail to a 22 mm rail without raising the sight height. They use two wedges and are very inexpensive. I now shoot my GK1's more than any other airgun and I am considering another one in 177 for low power pesting. You will be incredibly impressed with their accuracy and trigger. I feel they are every bit as accurate as a 10 meter Olympic pistol with a lot more power.

I mounted one with the dovetail adapter, and one with the picatinny adapter. It looks like the picatinny adapter is only 0.13” taller. Do you really think it’ll make the holdover that much worse?

 

[Pale_Rider]

I mounted one with the dovetail adapter, and one with the picatinny adapter. It looks like the picatinny adapter is only 0.13” taller. Do you really think it’ll make the holdover that much worse?

View attachment 554997

The difference will be negligible, if any. I do prefer the look of the sights with a removable base though. I tried a few adapters and while they all worked ok this one looks the cleanest and is the sturdiest. It’s designed to perfectly fit into where the rear sight mounts.

 

[Michael]

The difference will be negligible, if any. I do prefer the look of the sights with a removable base though. I tried a few adapters and while they all worked ok this one looks the cleanest and is the sturdiest. It’s designed to perfectly fit into where the rear sight mounts.

View attachment 555004

That’s clean!

 

[steve-l]

I mounted one with the dovetail adapter, and one with the picatinny adapter. It looks like the picatinny adapter is only 0.13” taller. Do you really think it’ll make the holdover that much worse?

View attachment 554997

It is a personal thing. Target acquisition must be fast and instinctive when pesting. .13 inches makes a big difference to me. The beauty of a reflex sight is the ability to still see the target when using hold over, but the correct amount changes rapidly with distance the greater the height differential between glass center and barrel center and that makes guessing a lot more difficult. I was so concerned with this I mounted a laser on my PP700SA that was .5" left of barrel center and adjusted dead parallel to the barrel. This worked perfectly, but in practice, I had trouble using it. That issue was mine alone. That solution technically was perfect. It allowed me to actually see the correct hold over requirement when both sights were working together.

 

[kkarmical]

I just received the .25 caliber GK1. Holy smokes this thing is ridiculously cool! Initial feelings are that I'm super impressed with the build quality, the power to air consumption ratio, and the trigger (which seems to best all the other semi-auto airguns I've tried).

I went down to AirStryke Industries on Saturday and picked up a dovetail to picatinny rail. I'm gonna mount that and this Hawke Frontier Reflex dot.

View attachment 553670

I can't wait to put it on target!

GK1 in .25 is the only airgun pistol I have used that you can actually point shoot at pistol distances.
Why not try just using it stock you may find you like it without any tacticool optics at all..

 

[JungleShooter]

MIchael a reflex sight is the only way to go, but going to the rail adaptor you chose sets the sight height too high above the barrel. This sets up the requirement to hold over the target at close range. I tried several different reflex sights and mounts and I now use a reflex sight that has a 2mm dot and 12 different intensity settings. I found this best for all light conditions. I also use an adaptor that converts the 11mm rail to a 22 mm rail without raising the sight height. They use two wedges and are very inexpensive. I now shoot my GK1's more than any other airgun and I am considering another one in 177 for low power pesting. You will be incredibly impressed with their accuracy and trigger. I feel they are every bit as accurate as a 10 meter Olympic pistol with a lot more power.

Steve,

for your low mounted optics solution — how low did you get it?
What number would you punch into a ballistic calculator for "scope height"?

Matthias

 

[steve-l]

Steve,

for your low mounted optics solution — how low did you get it?
What number would you punch into a ballistic calculator for "scope height"?

Matthias

Mattias,
AliExpress for all parts including the 2mm reflex sight. My glass center to barrel center distance is 29 mm.

 

[JungleShooter]

Mattias,
AliExpress for all parts including the 2mm reflex sight. My glass center to barrel center distance is 29 mm.

Wow, 29mm is really low!

I have a dot sight with a tube on it, with adjustable turrets (I am such a die-hard dialer....):
A Leupold Freedom RDS 1x34.
I got it down to 39mm scope height.
At my current power of 15FPE (in .22cal), and with a killzone of 1" —
I get a PBR of 6.5—35y.

With your 29mm scope height, that would give me a PBR of 4.4—33y (2y closer yet for those extra short shots — I just missed a pigeon a couple of days ago because of that...).

Matthias