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P250 Slide not locking back with empty magazine

This is a discussion on P250 Slide not locking back with empty magazine within the SIG Sauer Pistols forums, part of the SIG Sauer Forum category; Purchased a P250 Compact 9mm from Academy early Jan 2013. No ammo available so had to order online. So while waiting for ammo to arrive ...


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Old 01-18-2013, 07:10 AM   #1
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P250 Slide not locking back with empty magazine

Purchased a P250 Compact 9mm from Academy early Jan 2013. No ammo available so had to order online. So while waiting for ammo to arrive I cleaned the pistol and would operate the slide on occasion. About a week later I pulled the slide back and it did not lock with the magazine inserted. I checked online and found a few threads on the slide not locking and some said the magazine was the issue. I called Sig customer service and the rep said he would send me a new grip assembly. I asked if this is a known problem and he said no, but it was his best guess. I mentioned I had seen some online threads that mentioned the magazine was the problem and he did not think so. I later noticed if I pushed up slightly on the bottom of the mag the slide locked every time. I then purchased a new 15rd mag and when I tried it locked every time. I took both magazines apart and found the problem was very obvious. The spring in the original 15rd mag was much shorter than the new one I purchased. See pictures attached.
This is so blatantly obvious I can't believe Sig does not know about this problem. I called back and explained the issue and they want me to send back the original magazine and they will replace it. I asked if they would like to see the pictures and he did not. I also asked if this was a known issue and he said not to his knowledge. I don't think I believe him.
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File Type: jpg Mag spring that came with pistol too short.jpg (1.25 MB, 45 views)
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Old 01-18-2013, 07:47 AM   #2
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It sure looks like the wrong spring; maybe for a 12 or 10 round mag. The base plate on the short one looks different from that on the long one (and those on my 250 mags) or maybe it's just the angle in the pic.

My guess is it was a mixup in assembly at Mec-Gar; wouldn't expect that it's a common problem though.
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Old 01-18-2013, 08:20 AM   #3
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are the mags from the same mfg?
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Old 01-18-2013, 12:07 PM   #4
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Quote:
Originally Posted by tcmccormick View Post
...... I later noticed if I pushed up slightly on the bottom of the mag the slide locked every time. .
Had the same issue on my Sig 290.
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Old 01-18-2013, 12:10 PM   #5
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definitely looks like its the spring for a 10rnder
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Old 01-18-2013, 01:03 PM   #6
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The insert on the short spring looks different from that on the long spring. Could this be the insert for a "limited" mag (Calif. 10 round capacity in a 15 round tube)? I've never seen one myself. Maybe someone was assembling 10 round limited mags but grabbed a full cap tube.
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Old 01-18-2013, 01:50 PM   #7
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I measured the spring in the 10 rnd mag from my 2022. It's pretty close to the short spring above. Has the same style plate too.
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Old 01-18-2013, 02:34 PM   #8
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the bottom spring appears to be from the 250 subcompact
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Old 01-18-2013, 04:00 PM   #9
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Originally Posted by P225sig View Post
the bottom spring appears to be from the 250 subcompact
That could be; length is about right. I looked at my 15 and 12 round P250 compact and subcompact mags (9mm) and all the inserts are the same and look like the long spring in this photo. Not sure what the other is from.
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Old 01-18-2013, 04:45 PM   #10
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Academy? Two Sigs on the counter. Two slides on the counter. Slides get swapped? Very possible.
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Old 01-19-2013, 06:19 AM   #11
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Originally Posted by bearone2 View Post
are the mags from the same mfg?
Not sure about the one that came with the pistol (shorter spring). They both have Sig Sauer P250 and Made in Italy on the side. The only difference is the one that came with the pistol has holes that indicate how many rounds in the magazine on the slim (primer) side. It has 14 holes starting with #2. Also has holes on the side 5,10, and 15. The one I purchased that has the longer spring does not have the 14 holes on the primer side. It also has plastic base attached to the spring where the short spring has a metal base on the spring. The box I purchased the long spring mag is attached.
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File Type: jpg New magazine with longer spring.jpg (1.10 MB, 14 views)
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Old 01-19-2013, 06:21 AM   #12
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Originally Posted by ThnkFrst View Post
The insert on the short spring looks different from that on the long spring. Could this be the insert for a "limited" mag (Calif. 10 round capacity in a 15 round tube)? I've never seen one myself. Maybe someone was assembling 10 round limited mags but grabbed a full cap tube.
Good catch on noticing that. I had not noticed. I took it back apart to check and the short spring mag has a metal insert attached to spring bottom where the long spring one is plastic and slightly thicker. I bet as saudadeii and others mentioned a 10 rd spring was installed in this 15 rd mag.

Last edited by tcmccormick; 01-20-2013 at 06:13 AM.
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Old 04-04-2013, 08:12 PM   #13
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Same issue on my new P250C. Came here to see if I could find out what's up. Thanks for the info!
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Old 02-02-2014, 10:13 AM   #14
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Guys I have the same problem with my subcompact 9mm.I had my original magazines fully (12 rounds) loaded for some time and then the slide stopped being locked after last shot. The reason was simple, worn / weak spring. I disassembled the mag and gently stretched the spring beyond its resting state. When I put it all together everything worked fine. Unfortunately I think it will not last long. I blame the low quality spring. Once it appears again Im going bring it back to the seller. My Sig has cca 250-300 shots, 3 month old
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Old 02-02-2014, 10:34 AM   #15
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Looks like it got swapped by mistake
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Old 02-02-2014, 10:38 AM   #16
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Sorry to hear you're having problems, smurfbjj, but welcome to SIG Talk.
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Old 02-02-2014, 10:58 AM   #17
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Thanks man
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Old 02-03-2014, 11:05 PM   #18
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Quote:
Originally Posted by kriegbubby View Post
Looks like it got swapped by mistake
Hi buddy,

swapped for what? I have got the shortest mag for p250.
The mags are italian and both that have come with a gun are faulty.

Btw: the springs havent lasted ... mag is going back to seller. One by one nicely. I dont want to remain without any mag otherwise I would have to work on my throwing techniques instead :-)

Last edited by smurfbjj; 02-04-2014 at 12:24 AM.
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Old 02-04-2014, 07:59 AM   #19
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Quote:
Originally Posted by kriegbubby View Post
Looks like it got swapped by mistake
Quote:
Originally Posted by smurfbjj View Post
...swapped for what? I have got the shortest mag for p250.
Since he said "looks" I suspect he was responding to the photo in the first post of this resurrected thread.
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Old 02-04-2014, 10:57 AM   #20
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OK.Srry my fault. Im not a native speaker nor I have ever been in english speaking country. In my language we often use "looks like" as well in terms that are not necessarily related to physical appereance.PEACE
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