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Rank: Newbie
Groups: Member
Joined: 12/19/2009
Posts: 4
Location: NC
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Previous 2 trips to the range, every once in a while the 9mm compact's slide decided to go ahead and lock itself back midway through a magazine. I can rack it and keep shooting.
After the first time this happened, I numbered the 3 magazines to see if one might be causing the problems. Last night I shot over 200 rounds and it does not seem to be any one magazine in particular (or maybe all of them).
Any ideas on what's going on?
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Rank: Advanced Member
Groups: Member
Joined: 4/14/2009
Posts: 36
Location: CT
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Hmmm...that's a first, normally they have problems locking back on an empty mag. 
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Rank: Uber Member
Groups: Member
Joined: 4/2/2009
Posts: 257
Location: Springfield, MO
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Michaelrm wrote:Hmmm...that's a first, normally they have problems locking back on an empty mag. That was my first thought. Make sure the spring (and washer in some cases) that works the slide lock is clear of debris. When you get the slide off you will see what I am talking about. Also, make sure the area were the lever meets the frame/grip is clean too. Something is making it stick up. This is leaning more to the user. It could be your thumb touching it just enough (during recoil/cycle) to make it catch the slide. That is the most common issue in this case, shooter not the gun.
"I don't like repeat offenders, I like dead offenders." Ted Nugent
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Rank: Newbie
Groups: Member
Joined: 12/19/2009
Posts: 4
Location: NC
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dosborn81 wrote:
That was my first thought.
Make sure the spring (and washer in some cases) that works the slide lock is clear of debris.
It could be your thumb touching it just enough (during recoil/cycle) to make it catch the slide. That is the most common issue in this case, shooter not the gun.
Thanks for replies. The seat of the spring you described did need cleaning. Black paste that looked like assembly grease & powder but I'm not sure it was enough to interfere. (there was no washer tho). I also checked my grip - that's looking more likely. Thick thumbs  - this, I'll pay more attention to next time out.
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Rank: Uber Member
Groups: Member
Joined: 4/2/2009
Posts: 257
Location: Springfield, MO
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I think the washer on the spring was an after thought by Sig due to the problems with slide lock. In my case the slide would slam shut when I inserted a full mag. I sent it back and they fixed the problem, but I'm not sure if the washer was there before I sent it back. It works fine now. Well, I say that. I just got the slide and controls back from CCR for Cer-Plate. I can't wait to see how it performs. The slide does seem a little tighter due to the plating. You can check out my P250C .45 here. The latest is at the bottom of the page. http://www.p250sig.com/forum/yaf_postsm2053_What-do-you-think.aspx#2053
"I don't like repeat offenders, I like dead offenders." Ted Nugent
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Rank: Member
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Joined: 2/24/2010
Posts: 13
Location: Orange/Lake Cnty FL
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I experienced this once under 150 rounds. Noticed the mag was dry and shot some Rem Oil in it. No problem.
Sig P250 sub
9mm Critical Defense
Cross Breed Super Tuck
An attitude to WIN!!!
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