The appeal of the Blitz is the full auto but getting it to actually shoot full auto took me a lot of tinkering.
It would fire 3-4 shots and then stop working because it didn't cycle correctly, the side bolt wouldn't push far enough forward so I would have to push it in gear.
So I removed the side plate to reveal the gears inside and they were all covered in this white thick grease. I thought that perhaps that was the problem so I removed all the white grease and replaced it with regular gun oil. The cycling mechanic became really smooth and felt really nice compared to before but it didn't fix the cycling problem, it made it worse...
So after some googling and youtube videos I had a look at the magazines, many of them had "chew" marks on the red spacers that hold the pellets.
Basically the rifle was cycling faster than the magazine was spinning so the pellet probe would hit the spacers.
In the picture below the ideal pellet probe push would be in the green field and centered on the pellet but if the pellet probe cycles faster than the magazine can spin it might end up like the red circle where it chips the spacer. This causes several problems, it damages the magazine a bit by chewing on the spacers but more importantly it causes the pellet probe to lose speed so it doesn't push the probe into battery. I believe this to be the main cause of probably 90% of Blitz cycling problems.
View attachment 411914 So to fix this we need to get the magazine to spin faster. In the videos I saw and forum posts I read the recommendation was to drill a second hole in the backside and move the spring hook to the new hole. Pictured spring isn't the one in the magazine but I couldn't find a picture of the actual spring but it looks the same. The hole on the back of the magazine is where one of the ends of the spring is inserted and the other point goes into the red part of the magazine.
I did 2 magazines with a half turn tension but it didn't work so on the 3rd magazine I just spun the red part 1 rotation and lifted it over the stopper, so in other words I increased the spring tension by 1 full rotation. This made the gun work flawlessly.
View attachment 411915View attachment 411916 After thinking about it for a while here is what I believe happened with my gun.
The white thick grease paste isn't just there to grease the rifle but also to have it cycle at a certain speed, because I removed mine and replaced it with regular gun out the mechanic became a lot smoother and was now cycling even faster than before. I confirmed this with the ROF going from 1100 to 1400 shots per minute. Because I caused the rifle to cycle faster, half a turn of the magazine wasn't enough for the next pellet to move into position.
A full rotation of the magazine made it tight enough so it could now rotate quickly enough.
I will be getting Hi-Cap mags with the BPs I've ordered and I'm guessing I will have to tighten them as well, at least if the person who bought my old blitz wants to run high-caps in his rifle.