Blitz .22 keeps jamming up even without a mag just dry firing on full auto, Only shoots one shot an I have to cock bolt back to shoot again on full.

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MarksmanPete

MarksmanPete

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Oct 10, 2022
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Washington, US
So today I got to shooting the blitz yesterday it was doing fine no jams. today each shot I have to pull bolt back to shoot again, I did have bolt way back and turned up in the notch for 7 hours but that's not even that long so I don't know. Why is it jamming now each shot now, If I cant fix the problem its a return as I don't want it I bought it alone for the full auto an If I cant get that to a level of reliability then its useless for me. I added a donny fl adapter an am running a tatsu, was doing fine yesterday with exact same setup. It jammed 5 times in a row then it cycled for like 16 shots an again jammed I was dry firing to make sure its not a mag issue.
 
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Does it run fine without the moderator? The system seems very similar to the sortie which I had. I'd recommend fist checking the hammer spring adjuster in the rear of the receiver block. See if it's loose, maybe backed out. Also recommend pulling the shroud to check the piston. Make sure it's straight, not binding in any way. Lastly pull the side plate and check the racks and gear. Make sure that's all operating smoothly.

My sortie did not like being moderated. The end of the factory shroud had a large opening in it so it had minimal back pressure. Moderator creates some pretty extreme back pressure which directly works against the action as it tries to cycle.
 
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Weird seems like once pressure drops below 2900 or so it cycles for like a dozen shots, Then I have to pull bolt back, But when its aired up to 3100+ seems to not even cycle at all right now I just shot 6 shots fun switch is on, But I had to cock the bolt back for each one it wont even cycle in semi auto while dry firing so its the gun for sure, not the mags, Although my mags did caused a couple jams where the bolt smushed the skirt an it didnt pass thru due to pellet skirt being bent due to heavy spring tension on the extended 45 roung magazines, But that does not happen too often so its no big deal, The blitz is the real issue at hand here.
 
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Long_Gun_Dallas said:
Does it run fine without the moderator? The system seems very similar to the sortie which I had. I'd recommend fist checking the hammer spring adjuster in the rear of the receiver block. See if it's loose, maybe backed out. Also recommend pulling the shroud to check the piston. Make sure it's straight, not binding in any way. Lastly pull the side plate and check the racks and gear. Make sure that's all operating smoothly.

My sortie did not like being moderated. The end of the factory shroud had a large opening in it so it had minimal back pressure. Moderator creates some pretty extreme back pressure which directly works against the action as it tries to cycle.
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Wow okay I just tested it an found that it cycles flawlessly with the standard endcap as soon as I put on the donny fl one it goes back to a bolt action gun wont even do semi auto I have to rack the bolt back each shot I think its to due to the spring in the end of the barrel, I tried putting the little o ring on the standard end cap on the donny an without, It seems like it dont like the donny fl adapter eather way, It wont do full auto, I saw Izzy talking about it he said getting different springs of similar sizes if it does not function properly, Might need to do that as I wanna keep noise down.
 
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Gun is accurate with Crossman hollows lubed with fp10, already cleaned barrel twice when I first got it, An after I shot 600-700, Broke it in a good bit already only had it for one day it has already 900 shots through it, Here is a 20 shot group @ 22 yards, 2 fliers, 12+ stacked in .4 inch wow cheap an accurate. Just want to run a donny fl an it will be ready.

group.jpg
 
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Long_Gun_Dallas said:
Does it run fine without the moderator? The system seems very similar to the sortie which I had. I'd recommend fist checking the hammer spring adjuster in the rear of the receiver block. See if it's loose, maybe backed out. Also recommend pulling the shroud to check the piston. Make sure it's straight, not binding in any way. Lastly pull the side plate and check the racks and gear. Make sure that's all operating smoothly.

My sortie did not like being moderated. The end of the factory shroud had a large opening in it so it had minimal back pressure. Moderator creates some pretty extreme back pressure which directly works against the action as it tries to cycle.
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Just the donny fl adapter alone without a suppressor causes the issue. When I put the standard endcap that came with the gun its flawless, dumped the whole 45 rounds in to water jug no jams.
 
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Maybe the Donny FL adapter changed the amount of air pressure being applied to the operating rod assembly - or - the amount of spring pressure, or both. Does it have a larger or smaller diameter hole in it than the factory end cap? I am assuming smaller. No idea if the diameter of the exit hole will have any impact on the function. Is the surface on the Donny FL adapter that contacts the spring exactly the same length from where it contacts the front of the shroud as the factory cap?

I read about moderators causing function issues for some Blitz guns so I am still debating on whether to add one or not. If there was a known 100% function moderator and adapter option I would be more inclined to try one.
 
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Link to the Donny FL Adapter

It looks like the threaded length inside the shroud is pretty close to the same. Does it have the raised ring on the bottom to keep the spring centered?

1689310239617.png
1689310271434.png


Based on the comment by "willy" his didn't work in full auto mode, only semi but "Robert" said his works in full auto with the original spring, so hit and miss like I had read previously.
 
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Geezerhood said:
Maybe the Donny FL adapter changed the amount of air pressure being applied to the operating rod assembly - or - the amount of spring pressure, or both. Does it have a larger or smaller diameter hole in it than the factory end cap? I am assuming smaller. Is the surface on the Donny FL adapter that contacts the spring exactly the same length from where it contacts the front of the shroud as the factory cap?

I read about moderators causing function issues for some Blitz guns so I am still debating on whether to add one or not. If there was a known 100% function moderator and adapter option I would be more inclined to try one.
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Yea its smaller in diameter donnys is 3/8th inch an the standard is half an inch. I think imma need to get a lighter spring and test em out.
 
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ba49 said:
I haven't tried mine with a suppressor, but haven't had any other issues. My AEA HP Carbine semi auto won't work in semi either if I go over 3100psi either( has a 250 bar max)but no issues with the Blitz at any pressure up to max fill. I did read somewhere that some people were having some function problems with the 22cal. mags.
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Without the suppressor/Donny FL adaptor it works flawless.
Geezerhood said:
Link to the Donny FL Adapter

It looks like the threaded length inside the shroud is pretty close to the same. Does it have the raised ring on the bottom to keep the spring centered?

View attachment 372636 View attachment 372637

Based on the comment by "willy" his didn't work in full auto mode, only semi but "Robert" said his works in full auto with the original spring, so hit and miss like I had read previously.
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Yes it does have that raised end an it holds the spring like the standard endcap that comes with the blitz.
 
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You can't use moderators with the Blitz, nor any of the other airguns in Hatsan's semi-auto lineup. Most webshops specifically warn you about this on the product page of the adapter. Even on DonnyFL's own website:
1689322088487.png


These guns need low back pressure in order to cycle properly, hence why the end cap is so wide. The adapter narrows this opening down significantly, creating more back pressure. Some claim that the semi-auto function will still work, just not the full-auto. But experiences are mixed.
In short, the adapter is the problem, not the Blitz itself.
 
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It is a known fact that you can not put a silencer on a Hatsan auto.
So shoot it like it is or buy an other airrifle.

The problem wil only get worse in time because the hammerspring wil wear.
Your hammerspring is problably effected because it was under tension for so long.
Mine already broke within a year. I own an Invader.
And because your hammerspring is not as powerfull anymore it wont work and yesterday it did.
 
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MarksmanPete said:
The one at the end of the barrel that attached by to end cap.
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Yes, the one in the barrel, part 4974 och the exploded view
https://hatsanairgunsusa.com/wp-content/uploads/2020/12/Blitz-Exploded-View.pdf
Screenshot 2023-07-14 233726.jpg



Here is a picture on the Donnyfl Hatsan Bltiz adapter page, it shows the spring he replaced with. Text says to get a lighter spring, I guess it's one of those trail and error things you need to try until you find the one that works.
https://donnyfl.net/products/hatsan-blitz-1-2-x-20-adapter?_pos=1&_psq=blitz&_ss=e&_v=1.0
Screenshot 2023-07-14 234023.jpg
 
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keesbo said:
It is a known fact that you can not put a silencer on a Hatsan auto.
So shoot it like it is or buy an other airrifle.

The problem wil only get worse in time because the hammerspring wil wear.
Your hammerspring is problably effected because it was under tension for so long.
Mine already broke within a year. I own an Invader.
And because your hammerspring is not as powerfull anymore it wont work and yesterday it did.
Click to expand...
Yea thats what I was thinking I made it weaker 7 hours aint too long compared to a day but I dont know, hammer spring is 10 dollars from hatsan, I already got a spare one,
 
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MarksmanPete said:
Yea thats what I was thinking I made it weaker 7 hours aint too long compared to a day but I dont know, hammer spring is 10 dollars from hatsan, I already got a spare one,
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You did not make it weaker by leaving it compressed for 7 hours. Leaving the bolt locked back with the spring compressed for 7 or 70,000 hours, will not weaken or fatigue the spring any more than leaving the bolt closed. Whether a spring is left in a relaxed or compressed state, within the design specifications has nothing to do with it taking a set or losing strength. Compression / decompression is what "wears out" a spring, so don't worry about leaving the bolt locked back / hammer cocked, at all times when not shooting the. It is of course a bit safer if you don't have the hammer cocked back when storing it, but I can't see that bolt handle letting go by accident on the Blitz from the locked back position.
 
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