I learned something new today...

[308]

Perhaps this is known already, but I was told many Semi-Auto handguns will automatically release the slide when a full magazine is slapped into the magwell...not gently inserted and locked, but with a bit of applied force. I tried it on the CZ P09 and yes, it releases the slide.

I didn't know this would happen because I never experienced it at the range. My guess is the Sig and Glock will end up doing it as well, but I'm going to wait unitl I can get some snap caps to test it out.

None of this happens with an empty mag though.

Live and learn...one more safety issue to pay attention to.

Read More

 

[Koda]

more like it can happen.

Usually the magazine might need adjusting if its a regular occurrence the slide stop should be fully engaged after the last round is fired.

 

[Switchblade666]

I don't have any snap caps for my autos but I want to try it now. I think I just threw out all my old spent casings. Curious to see what happens. I know I've slammed mags into my glock before but don't recall ever having the slide automatically throw forward and chamber a round..

 

[308]

There is a CZ forum posting about this on Facebook. Lot's of guys chiming in claiming their CZ and M&Ps do this.
For the time being I'm going to have to disagree the inertia drop is a "design feature" but rather something that happens or can happen with a loaded mag.

It certainly does not happen with my G34, P229 and CZP09 when slamming in an "empty" magazine.

 

[Mikej]

It happens on Wifey's relatively CZ 75 9mm. You do have to smack the mag in pretty hard. It's still somewhat disconcerting. I don't know about my CZ 75 P01 Tactical though. It hasn't done it, though I don't think I smack the mag in that hard?

 

[etrain16]

My M&P 9c (carry gun) does it all the time, but not every time. I asked about that at a class once, and was told it was something that will happen with some guns, but it sounds like it wasn't necessarily completely predictable. So, I know my gun can do it, so as I train with it, I simply assume each time I'll need to release/rack the slide myself, if I don't, it's just one lest move.

I've never experienced this with a Glock.

 

[tac]

Never happened with MY CZ75. But maybe I wasn't trying to drive the mag up through the slide as I've seen some people do.

tac

 

[No_Regerts]

The original M&P, which is my current duty weapon, does this all the time. The M&P 2.0 actually has a small plunger thing that forces the slide stop to remain engaged. My 2.0 hasnt dropped the slide on a reload yet.

 

[EPS]

My GEN4 glock 22 will do it if I tap Mag with a good smack but I rented a M@P the other day at the range and it did it with every reload with a tap on Mag and one time it did it with out catching a round so had to rack the slide that's not good

 

[11Charlie]

I don't usually slam my mag's home. But I will now have to check and see if any of mine do this.

Thanks for the heads up 308.

 

[EPS]

I don't usually slam my mag's home. But I will now have to check and see if any of mine do this.

Thanks for the heads up 308.

I don't do it all the time but if I don't think it clicked in I will tap with my palm just to be sure but the M@P we where shooting did it all the time

 

[EPS]

Most of the time I push the Mag in and use my palm to make sure it gets in good but sometimes I'll give it a extra tap lol

 

[Caveman Jim]

I'll give my XDM40'S a test today...
Never really heard of this happening either...

 

[nammac]

Design feature or flaw? Never experienced this, but then again I'm usually not that aggressive with reloads. Now I'll need to do some testing to see if I can get any of mine to do this...

Has anyone gotten a 1911 to behave this way?

 

[EPS]

My old P89 never does it

 

[Hawaiian]

My HK's all do it. Don't have to slam in the mag, but use a little extra force and the slide will drop into battery every time. I believe it is designed to do so as it is works on all of my HK's. If it was a design failure, HK would have fixed it long ago.

 

[Camelfilter]

Some of our CZ's do it, and 1 of the Canik's. I'm thinking it might have to do with break in, as the ones that do it see the most range time.

 

[Koda]

Has anyone gotten a 1911 to behave this way?

I have. But I was taught to slam the mag home during emergency reloads and malfunction drills. Shot with a friend who had a full size Glock 9mm that did it too.

 

[Koda]

My HK's all do it. Don't have to slam in the mag, but use a little extra force and the slide will drop into battery every time. I believe it is designed to do so as it is works on all of my HK's. If it was a design failure, HK would have fixed it long ago.

I don't think this is a design feature because it doesn't happen all the time and under normal insertion like administrative loading, HK would advertise that way if it was. I think its just the nature of the limitation of magazine designs, probably related to designing as many rounds as possible in the mag might have to use weaker springs.

 

[thorborg]

I'm not a slammer jammer but dammer, now I gotta try.
Good post, I like pondering new stuff.