FTF/slide locking back issues
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Old 12-29-2013, 02:23 PM   #1
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Default FTF/slide locking back issues

I just bought a CZ-52, and I'm having problems with it. Every 2-3 rounds, the slide will lock back, and the round won't be stripped from the mag. The gun will eject (launch into the next county) spent brass just fine though. The slide just keeps locking back for some reason.

When the slide locks back, it is usually stubborn about releasing, and it will take a pretty firm pull (probably more than should be required. Not sure since this is my first CZ-52) to get it to release. If you don't do it just right, the slide will just move back just a little, and then return to where it was (in the locked open position). Though, it did release easy once while I was shooting. It locked back like I explained above, but this time it slammed home when I just barely touched it.

Any ideas?

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Old 12-29-2013, 02:31 PM   #2
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Do you have an extra magazine to try and see if you can rule out a magazine problem?

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Old 12-29-2013, 02:35 PM   #3
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No extra mag yet. The slide is stubborn about releasing even with the mag out though.

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Old 12-29-2013, 07:54 PM   #4
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Could it be the slide stop?

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Old 12-29-2013, 09:40 PM   #5
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The slide release/lock may be bent. It is supposed to lock the slide back on the last shot but if bent or the wrong one it will lock up the slide. Sometimes on every round.

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Old 12-30-2013, 03:54 AM   #6
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Quote:
Originally Posted by JTJ View Post
The slide release/lock may be bent. It is supposed to lock the slide back on the last shot but if bent or the wrong one it will lock up the slide. Sometimes on every round.
I'll be sure to look for any bends in it. I'm about to take the gun apart, give it a REALLY good cleaning and oiling, inspect the slide release (and everything near it), and see if I can't get it working without having to order any parts.

I did go ahead and order 2 surplus mags from MidwayUSA though. They had them on sale for $14.16 each.
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Old 12-30-2013, 04:12 AM   #7
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its very easy to assemble a cz52 slide release/lock incorrectly causing this to happen or the spring for the release could be missing or very weak. i doubt its a mag issue as that would show up on last round fired as a fail to lock open

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Old 12-30-2013, 06:59 AM   #8
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I think I found the problem. The slide release/safety detent spring doesn't seem to be working with the slide release correctly.

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Old 12-30-2013, 07:13 AM   #9
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Ok, here's what it's doing. The spring is under the slide release as opposed to above it as it should be. With an empty mag inserted, it will automatically move up and lock the slide open when the slide is pulled back.

When I put the spring above the slide release, it does not always let the slide release automatically move up and lock the slide open. However, I can manually move it up, and it will stay. I can also easily release it just by slightly pulling the slide back (like with any semi auto). No more firmly (hard and fast) pulling it back to get it to release. If it's locked open and I remove the mag, the slide releases and slams home.

So should I just replace the spring?

A pic for reference (not mine)



This is how the spring should be. Notice the end of the spring (the arm) is sitting on top of the slide release. The spring on mine was sitting under it. I moved it up, but experienced the problems described above.

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Old 12-30-2013, 12:45 PM   #10
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Quote:
Originally Posted by texaswoodworker View Post
Ok, here's what it's doing. The spring is under the slide release as opposed to above it as it should be. With an empty mag inserted, it will automatically move up and lock the slide open when the slide is pulled back.

When I put the spring above the slide release, it does not always let the slide release automatically move up and lock the slide open. However, I can manually move it up, and it will stay. I can also easily release it just by slightly pulling the slide back (like with any semi auto). No more firmly (hard and fast) pulling it back to get it to release. If it's locked open and I remove the mag, the slide releases and slams home.

So should I just replace the spring?

A pic for reference (not mine)



Spring on top is the correct orientation. All firearms with a slide lock require a spring to hold it in the down position so it doesn't do what yours was doing in your original post.

This is how the spring should be. Notice the end of the spring (the arm) is sitting on top of the slide release. The spring on mine was sitting under it. I moved it up, but experienced the problems described above.
Now that you fixed your first problem your now in the realm of either dirty or unlubed slide release or bad magazine or dirty magazine.

If you can take the magazine apart give the insides a good scrubbing and cleaning with clp. Clean the slide release and lube with clp. Just make sure the magazine isn't dripping with clp just a very very very light coat. If that doesn't work wait for the new mags as the spring in your current one is probably worn
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Last edited by JonM; 12-30-2013 at 12:48 PM.
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