Bad experience - CZ P-09 and Kaw Valley Precision Comp

I had something similar happen with a P10C when a suppressor was mounted. Gun worked fine without it on the gun, but as soon as the suppressor went on, the gun was a single shot. At least for the first couple of hundred rounds or so shooting that way. It seemed to get better the more you shot it, but the short while I had it, it was never a 100% with the can on there.

It appears its a pretty common thing too, as I came across a number of people on YouTube with the exact same problem. It was supposed to "break in" after a couple of hundred rounds, and as I said, mine did get better, but it still had issues.

It was interesting too, considering the P10C was a very close copy to the Glocks, which I also have, and never had any issues with the suppressor mounted. From what I could see, and was my best guess as to what the problem was, the bevel cut on the front of the hood was at a slightly sharper angle on the CZ, and when the can was mounted, the added forward weight, just tended to bind things up until it started to wear in.

CZ-75s are tilting barrel, they are all variations of the browning lockup.....or at least that's what ive always understood.

Could also try a slightly lighter recoil spring.
My modified XD45 tac wouldn't run normal 45 ACP ammunition once I put the compensator on it. had to drop recoil spring weight to get it running properly.
It was easiest thing to do when switching back and forth between supers and regular 45 ACP rounds.
24lb spring for the supers, 18lb spring for the regulars

Is the Comp heavy ? Aluminum or Steel ? The length might be part of it . Most pistols won’t tolerate a Comp and 115 gr. standard loads .

Any weight to the muzzle end will likely add to the pressure on the hood, which is what I think was going on with mine. As I said, the gun ran fine without the can on it, and seemed to be breaking in, the more I shot it with it on there.

If you like the gun, maybe don't give up on it so quick and shoot it a while and see how things go. It may come around.

One thing that's always annoyed me about some of the gun makers is, their thinking its our responsibility to take the time, effort, and extra money, to break the guns in. They should already come broke in and functional.

If they include a threaded barrel and higher sights with the gun, "hinting" that its "suppressor-ready", then it had better work out of the box with whatever you thread on the barrel.

Orion8472, if you look at Kaw Valley products they are designed for the Ar platform. 9mm ARs are mainly blow back unlike your CZ. If you are looking to use a comp maybe try one that is designed for your type of gun.

Take it off and get your $29 back.

I was going to do the same with my P-07. Put a blast forward device in it. But after your testing. I’ll just leave it as is.

Just put a dab of LocTite on the threads and put a thread protector on it. You never know.

Orion8472 said:

Thanks for all the replies. I actually purchased the KAW for my AR rifle,...and it seems to do well with it.

As for the CZ P-09 itself, without anything on the end of the barrel, it runs very well and is quite accurate. I may just get lower sights for it and use it that way...because at least the threaded barrel end sticking out looks neat!

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have you considered a suppressor? I’m thinking about it. As a home defense safety device

Orion8472 said:

No,...mostly because I don't want to jump through the ATF hoops, pay them the $200 tax stamp, wait for however long, then spend several hundred dollars on a suppressor. Just too much for me.....but if you're good for it, then go for it!

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The idea of a $200 tax on a $400+tax tube with spacers. leaves a bad taste

My new FN 509 Compact Tactical came with a threaded barrel and two different weight recoil springs. One is standard and one for muzzle device use. I'm sure a new spring will fix your issue.

I'm probably going to sell the P-09 at this point. I don't have the patience or the ammo to put into breaking it in.

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One thing that's always annoyed me about some of the gun makers is, their thinking its our responsibility to take the time, effort, and extra money, to break the guns in. They should already come broke in and functional.

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A CZ P-09 works perfectly fine with a suppressor using a Nielsen device/muzzle booster. A muzzle booster is required for any Browning tilting-barrel short recoil-operated pistol to operate reliably with the weight of a suppressor hanging off the barrel.

The issue here is not the pistol. It is the weight of the muzzle device.

It is quite common to have to change out the recoil spring with a lighter one when adding a comp to pistols.

Fishbed77 said:

A CZ P-09 works perfectly fine with a suppressor using a Nielsen device/muzzle booster. A muzzle booster is required for any Browning tilting-barrel short recoil-operated pistol to operate reliably with the weight of a suppressor hanging off the barrel.

The issue here is not the pistol. It is the weight of the muzzle device.

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I still think there was something going on with my P10 and they have some tolerance issues going on. Sounds like it might be the same thing with the P09.

Personally, I think the relationship of the angle of the bevel on the front of the barrel hood and the slide is likely the problem, but that's just a guess on my part. The Glocks have a more pronounced bevel, and Ive never had an issue with the same can on them.

I was using my AAC Eco-9, which isn't a real big can, on my P10, and it wasn't having it for the first couple of hundred rounds, and was mostly a single shot.

I do think it was "wearing in" as I was shooting it though, and it did get better. When I got rid of it, I was getting through a mag for the most part, but still haveing stoppages here and there.

trackskippy said:

I still think there was something going on with my P10 and they have some tolerance issues going on. Sounds like it might be the same thing with the P09.

Personally, I think the relationship of the angle of the bevel on the front of the barrel hood and the slide is likely the problem, but that's just a guess on my part. The Glocks have a more pronounced bevel, and Ive never had an issue with the same can on them.

I was using my AAC Eco-9, which isn't a real big can, on my P10, and it wasn't having it for the first couple of hundred rounds, and was mostly a single shot.

I do think it was "wearing in" as I was shooting it though, and it did get better. When I got rid of it, I was getting through a mag for the most part, but still haveing stoppages here and there.

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that’s a huge silencer! must sound like a bb gun

Mark_Mark said:

that’s a huge silencer! must sound like a bb gun

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Its not really. Its only about an inch in diameter, and its pretty light.

With subsonic, and shooting it "wet", its pretty quiet. Nothing close to movie quiet though.

Ive shot it in the carport, and the people on the other side of the joining wall in the house didn't hear a "gunshot". I can also shoot it there without hearing protection.

trackskippy said:

Its not really. Its only about an inch in diameter, and its pretty light.

With subsonic, and shooting it "wet", its pretty quiet. Nothing close to movie quiet though.

Ive shot it in the carport, and the people on the other side of the joining wall in the house didn't hear a "gunshot". I can also shoot it there without hearing protection.

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I wish we can buy them over the counter like in the rest of the world

Mark_Mark said:

I wish we can buy them over the counter like in the rest of the world

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Land of the free...... Well, sorta.