anyone familiar with ISSC MK22?

[chengchy]

I have one, after fixing the light primer striking issue, I now have a feeding problem. Every time, the spent case is ejected without issues, but the next round can not be chambered. Changing the magazine did not help, anyone has any quick fixes?

This is really a bad gun, too many issues

 

[motoman]

Mine has issues with a round getting stuck down in the mag. I usually tap the mag at the back to seat the rounds forward. Also I have to keep the gun clean and lubed

 

[Bluebulldog]

OK.

Ammo has a lot to do with it. Cheaper dirty stuff is going to foul the bolt face, chamber etc.

Have you ever disassembled it and actually cleaned the bolt? Scrubbed the bolt face?

 

[JQIAN]

I don't have one, but I saw a friend was firing it and constantly swearing and knocking/tapping the magazines.

 

[Smitsauce]

I also had problems with the mags. I left them fully loaded for an extended period of time, and after that, they must have warped and they never fed properly after that. The bolt on this rifle is an abomination!!!! Same as the Anschutz Mk22, GSG 16 and the STG44 too. Google the bolt disassembly video and see how ridiculous the design is to take apart! I had one and 2 of the more accurate Anschutz versions and an STG44 version as well. After I went to clean one out after it was all gummed up, sold them all right after!!!

Kinda looking at the Kriss Vector 22 now, as it looks to be a fantastic design to take apart and to clean. Looks to be excellent access to all the critical areas to clean out.

My 2 cents...

 

[chengchy]

OK.

Ammo has a lot to do with it. Cheaper dirty stuff is going to foul the bolt face, chamber etc.

Have you ever disassembled it and actually cleaned the bolt? Scrubbed the bolt face?

Oh, yeah, I took apart everything, cleaned and lubricated.
The ammo I am using is actually some cheap bulk, but I did try mini mag which had the same issue, not even much better.

 

[chengchy]

I also had problems with the mags. I left them fully loaded for an extended period of time, and after that, they must have warped and they never fed properly after that. The bolt on this rifle is an abomination!!!! Same as the Anschutz Mk22, GSG 16 and the STG44 too. Google the bolt disassembly video and see how ridiculous the design is to take apart! I had one and 2 of the more accurate Anschutz versions and an STG44 version as well. After I went to clean one out after it was all gummed up, sold them all right after!!!

Kinda looking at the Kriss Vector 22 now, as it looks to be a fantastic design to take apart and to clean. Looks to be excellent access to all the critical areas to clean out.

My 2 cents...

Ok, I will look into that. I am going to throw this thing away if no one else wants it. A piece of junk, hideously designed.

 

[Hunter7]

I don’t personally own one but a friend of mine does and all I have to say is don’t walk, but “run Forrest run”. Constant light strikes, the magazines are absolute crap, it’s like they are too tight and the round does not get pushed up far enough to reliably feed. No amount of cleaning or lubing would cure this. We actually had to disassemble the mag and make tiny thin washers from a pop can to shim the mag a little bit wider so the rounds would feed smoothly. ISSC in Austria had a kit to eliminate the light strikes and we contacted them and they sent out the kit free of charge, it did help but did not eliminate the issue totally. As mentioned above, the bolt and disassembly of the rifle is an abomination. At the time, this gun sold for $800. That all being said though, it was quite accurate when it worked.

 

[chengchy]

I don’t personally own one but a friend of mine does and all I have to say is don’t walk, but “run Forrest run”. Constant light strikes, the magazines are absolute crap, it’s like they are too tight and the round does not get pushed up far enough to reliably feed. No amount of cleaning or lubing would cure this. We actually had to disassemble the mag and make tiny thin washers from a pop can to shim the mag a little bit wider so the rounds would feed smoothly. ISSC in Austria had a kit to eliminate the light strikes and we contacted them and they sent out the kit free of charge, it did help but did not eliminate the issue totally. As mentioned above, the bolt and disassembly of the rifle is an abomination. At the time, this gun sold for $800. That all being said though, it was quite accurate when it worked.

Thx for the information. However, I resolved light prime strike myself by cutting off a part of spring holding back the pin striking the prime. There are many videos on Youtube about this. That being said, failure to chamber did not haunt me first time I resolved light prime strike and test-fired at the range. A couple of hundreds rounds have gone through without any further light prime strike by now. So I consider it being fully addressed. I will try your approach trying to shim the mag and see if it works. Beyond that, the gun is quite accurate as you have mentioned.