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AR15.COM
11/9/2009 2:20:45 PM EDT
Is it normal for the slide to automatically release and close, when a new magazine is slammed into place?
11/9/2009 2:25:09 PM EDT
[#1]
inserted, no
slammed, maybe...

just means your slide lock doesn't have much engagement on the slide, varies from gun to gun.
11/9/2009 2:28:44 PM EDT
[#2]
could be time for new mag springs.
11/9/2009 2:34:26 PM EDT
[#3]
Common with Glocks, HKs.
11/9/2009 2:37:05 PM EDT
[#4]
yea, the mag spring COULD have something to do with it...
if the spring was weak it may not lift the slide lock fully upward for full engagement, just hanging on the edge.
11/9/2009 2:48:30 PM EDT
[#5]
I can make this happen on my glocks/sigmas/xdm if I slam it hard enough.  Not sure if there is any harm when doing it but just adding that yes it seems common.
11/9/2009 3:03:38 PM EDT
[#6]
Quoted:
I can make this happen on my glocks/sigmas/xdm if I slam it hard enough.  Not sure if there is any harm when doing it but just adding that yes it seems common.

It needs to be fixed......... i'm gonna spray on Tripp Magazines here for a sec.... I've kept 2 loaded 24/7 for last 4 or 5 months. Last weekend I functioned checked them in preparation for an IDPA match and the slide stop was partially engaging. An ordinary slap in with a magazine and the slide would fall... Not a desirable trait in a weapon... I marked it on butt plate with tape and took it for a spare. My other 3 eight round magazines fully engaged the slide stop... Will call Tripp and see what they say.... Metal is metal and springs are springs,  over time under duress it fatiques. I'd try magazine springs first before doing anything with slide stop.

11/9/2009 3:03:49 PM EDT
[#7]
when you SLAM the magazine in the slide stop stays put while the rest of the gun goes up.  Normal, kind of, but you can install a new thumb safety plunger spring and put a small detent in the slide stop to lessen the chance of this happening.
11/9/2009 3:53:03 PM EDT
[#8]
This happened in a couple of classes when the instructors started putting some time pressure, and I started slamming in the reload.

None of the instructors said "That's really bad. Get that checked out." So later I wondered, "Is the slide *supposed* to always close on it's own?"

I see it as a problem because it is irregular and unpredictable. From a training perspective, it is a surprise when it happens and I don't expect it, but it's unnerving if it doesn't happen when I do expect it. I probably need much more range/practice time so that I am neither surprised or unnerved and deal with it.

I'll number my magazines and take the time to try each one and evaluate how well the slide stop engages after last round. And I'll try fully, manually engaging the slide stop, and see how hard a SLAM will cause the slide release to disengage.

Thank you for all of your replies.
11/9/2009 4:19:47 PM EDT
[#9]
Your pistol IS NOT defective.
11/9/2009 4:45:28 PM EDT
[#10]
Normal.  All my 1911s do it if you smack the mag in hard enough.
11/9/2009 5:13:14 PM EDT
[#11]
I do not consider this normal, but as long as the hammer doesn't follow the slide, it isn't too critical.

I had this problem about ten years ago on my Series 70.  It happened suddenly at a range session, and occurred with seven different magazines.  I had been planning to replace the arched MS housing with a straight one, and when I did, the problem went away.  There is no logical explanation as to why this happened, but I'm happy with the results.    Some told me the problem was a weak or dirty plunger spring, others said there was excessive wear on the slide stop or detent.
11/9/2009 5:27:36 PM EDT
[#12]
Quoted:
I do not consider this normal, but as long as the hammer doesn't follow the slide, it isn't too critical.

I had this problem about ten years ago on my Series 70.  It happened suddenly at a range session, and occurred with seven different magazines.  I had been planning to replace the arched MS housing with a straight one, and when I did, the problem went away.  There is no logical explanation as to why this happened, but I'm happy with the results.    Some told me the problem was a weak or dirty plunger spring, others said there was excessive wear on the slide stop or detent.


You want a unique experience... slap a mag into your 1911 from a ready stance at a Green Valley IDPA match and the slide drops on your magazine slap. Your going to get some unwanted attention PDQ.