ISSC M22 Problems and Solutions

I solved my problem by leaving the M22 at the local gun shop for sale but I have a new problem.
I don't have a 22 to teach my kids on.
Does anyone make a 22LR conversion for the Sig P320?
 
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Mine is the model with the rounded trigger guard and it functions just fine on CCI Standard ammo (feeds and cycles). The only problem it has is the occasional light strike, but if you #### it again then it fires on the second go.

There's a small gun shop in the states that makes a heavy hammer spring that I might try. Of course a heavier spring may make the slide more difficult to operate and could result in feeding or extraction problems. We'll see.

From what I've read these pistols are a bit of a gamble, especially the 1st gen version with the squared off trigger.
 
I have a Norinco 93, I bought an issc as I thought it would be a nicer gun for my kids. Sure glad I didn't sell the Norinco.
The issc is complete garbage. I wanted to like it, it looks and feels good but it just wouldn't work. FTF, FTE, I tried multiple different loads Inc minimags and stingers. Avoid it like gas station sushi.
 
Any old Ruger, browning, as long as it comes with mags , S-W victory, 422, 22a? Hi standard will all work. Colts , but they are expensive
You will notice GSG is not listed.
Conversion kits will cost more than a lot of these guns.
Any gun that you have to run mini mags to make work is crap.
 
I am not up on the Glocks, don't really like them.
Most of those guns I listed are solid steel, no plastic, so heavier than what you had.
But they work, will last forever, when I referred to browning mags, that was for the older generations, Challenger, Nomads.
The newer buckmarks , no problem finding mags you can buy MK11 used Rugers for 300.oo or so, the standard models have lighter barrels, the target models of all these guns are heavy, not the best for young kids, but they work.
There are more out there, plastic and pot metal just don't turn me on, But I am old and like steel and nice wood. Hell, I shoot revolvers still.
Kids How old? My kids are middle age.
 
thatmikeguy said:
Are they light weight and relatively low cost?
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Mostly no to both of those questions.

ISSC - 20.6 oz
G44 - 14.6 oz
----------------------------------------------------
Ruger Mk 4 22/45 - 34.4 oz
Ruger MK 4 22/45 Lite - 25 oz
Buck Mark Camper UFX - 34 oz
Buck Mark Lite URX - 28 oz
S&W Victory - 36 oz
 
nosman said:
Is it new or older version? Mine has never once failed to extract or load. Never had a misfire either and I’ve ran 100’s of rounds through it. There’s all kinds of fixes for the first Gen but this one seems the best to me...

Click to expand...

Never fails (ISSC M22 not withstanding) that there's always someone who confuses the ISSC MK22 (rifle) with the ISSC M22 (pistol). Including Cabela's after I had ordered some M22 mags that were on sale only to receive MK22 mags - Cabela's didn't understand they were different.


Anyway, I am on my second M22 pistol, returned the first to manufacturer after finding it a complete failure. ISSC sent me a new pistol, said it was a newer and improved version. I should of sold the replacement as new & unused but curiosity got the best of me and I wanted to verify their claims of a better & improved pistol. Sadly they were wrong and I was back to square one.

What I have done so far with moderate success:
1. disassembled the entire pistol, taking apart everything, including the firing mechanism, firing pin, etc. Cleaned it all - lots of grease from manufacturer removed. Lightly lubed parts that move.

2. replace hammer spring (ht tps://www.bulletbutton.com/product-p/isschhs.htm)

3. some ammo is just failure prone with it, others with moderate success. Still proving what's best, that said CCI Stingers have not failed on me but not necessarily what I want to use all the time.

Considering:
1. source a better extractor

2. source a stiffer main spring (recoil spring) - I think that may help. Btw, the main spring has a 1mm difference on each end and needs to be placed properly for best function - the larger diameter 15mm end needs to be forward to muzzle end, while the 14mm diameter end goes over the barrel towards the breech.

3. change firing pin (slightly longer and or harder material)

It's become a project, not sure I can sell it to someone looking for something that always goes bang when this doesn't. But it's getting better....
 
How did you get the spring from bullet button? I emailed them with no response and it looks like their web page doesn’t do international orders.

My pistol cycles CCI Standards just fine but I get light strikes occasionally. It happened last night 3 or 4 times out of the 50 rounds I fired. Not bad for a plinker, but unless I get that rate lower then I might have to consider a different pistol for Rimfire Challenge matches.
 
I bought a new recoil spring and then started shortening the old one. It didn't help. How this gun ever made it into the market is beyond me. I take pride in tinkering with guns and making them work, but the issc should be sold as a "nonfiring replica".
 
I also noticed that the firing pin is designed to hit the barrel and the rim at the same time. Its like the designer thought the pin would over crush the rim. That certainly wont help produce reliable ignition which is why I filed the end a bit. That said, the Velocitor ammo worked perfectly for some reason.
 
I opened mine up tonight and it looks like the previous owner had polished the firing pin. The screws that hold the safety levers on were slightly marred and had thread locker on them. I also noticed there was some thick oil in the firing pin channel so I de greased it and used some g96 gun treatment on it. That g96 stuff dries to a light film, I like it.

We’ll see if that helps.

I was pretty disappointed to see that the firing pin looks to be two pieces somehow welded together. It’s split length ways along its entire length and is plain to see. I can’t imagine why this was done and it’s likely a weakness in the design. I can see that eventually coming apart on day.

Weird, the block that holds the firing pin, safety, and disconnect plunger, the hammer mechanism, and trigger parts all look well made and machined. Yet the firing pin (arguably the highest wear part and weakest link in the system) is shoddily made? I don’t get it.
 
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