S&W M&P .45 LEO Trade In (Question)

[Deplorable Me]

My son purchased a LEO trade in. (Used Gun) Looks like it was well cared for. No handling or drop marks. No safety. Almost no holster wear. Internally the minimum wear spots on the barrel and slide. It's got the 4" barrel. Night sights. It shoots just fine. Runs all the ammo from defensive to lead reloads.

Here's the question:

Whenever we slap a full 10 round magazine in (any ammo), the slide automatically closes feeding a round into the chamber. About 400 rounds through the recently acquired used gun (his). 100% repeatability, that slide closes. Is this normal by design? I could see this being of advantage in a combat/tactical situation. Not sure if I'd want it on a target gun/target range.

Thoughts?

 

[Airborneguy]

Could be an agency specification, but I doubt it. I'd have it looked it. Does it have agency markings, or does he know where it came from?

 

[Deplorable Me]

Nice agency logo on the top: Wilmington, NC

 

[MikeyCNY]

I've heard of this happening in both M&Ps and Glocks (and likely other models as well); several people see it as an advantage for reloading.

The new M2.0 versions of the M&P have a stiffer slide release so this doesn't happen.

 

[ECU Pirates]

It's common on M&P's. Mine does it. Slap a mag in firm and the slide cycles. It's not by design but I liked it.

 

[togmaster]

My P10c does the same thing. You have to insert the mag with a little force and the slide will release. I really like it.

 

[Saltwater60]

I like that too. It’s nice. I’ve heard of slam fires happening though. Does this have something to prevent that from happening. Firing pin block or something??

 

[Carlos Hathcock]

Wouldn't you get a slam fire regardless of when you release the slide, if one happened at all?

 

[stokes]

My Glock 19 has been doing that for 20+yrs.Never had a slam fire.Never thought it was a problem,liked it when re-qualing.

 

[Edwardteach72]

This is a common thing in most auto loading pistols, you will not get a slam fire. Don't expect it to happen every time

 

[Acer-m14]

get on Julie Golob's FB page and ask the MnP expert .. or i can .. may take a day or more till she see's it ..

 

[Darth]

I can do that on a few semis. A nice hard push in will make it happen. I can do it on one of my P99s and my G20C, that I know of.

 

[libertysnake]

My son purchased a LEO trade in. (Used Gun) Looks like it was well cared for. No handling or drop marks. No safety. Almost no holster wear. Internally the minimum wear spots on the barrel and slide. It's got the 4" barrel. Night sights. It shoots just fine. Runs all the ammo from defensive to lead reloads.

Here's the question:

Whenever we slap a full 10 round magazine in (any ammo), the slide automatically closes feeding a round into the chamber. About 400 rounds through the recently acquired used gun (his). 100% repeatability, that slide closes. Is this normal by design? I could see this being of advantage in a combat/tactical situation. Not sure if I'd want it on a target gun/target range.

Thoughts?

As long as it doesn't fire when you slap the mag in. I don't recall if it happens on my Shield (1.0) Performance Center, but I'll check next time I'm at the range.

 

[Darth]

I like that too. It’s nice. I’ve heard of slam fires happening though. Does this have something to prevent that from happening. Firing pin block or something??

The very design of the pistol makes that impossible.

It's just a cycle of the slide. Same thing that happens when you fire a round.

 

[Edwardteach72]

It won' slam fire, how is this even a question.

When you hit your slide release, or "slingshot" your slide home does it slam fire?

No

So why would putting a magazine in that causes the slide to go home be any doesn't

 

[libertysnake]

It won' slam fire, how is this even a question.

When you hit your slide release, or "slingshot" your slide home does it slam fire?

No

So why would putting a magazine in that causes the slide to go home be any doesn't

Always better to test on the range regardless and make sure you know what it will do, reliably, before you carry it.

 

[Acer-m14]

If its a free floating pin and it gums up and stick out it can go POW!! .. i'm not up on this firearm but seen this issue in some 1911's

 

[libertysnake]

If its a free floating pin and it gums up and stick out it can go POW!! .. i'm not up on this firearm but seen this issue in some 1911's

nah it's not free floating like an AK or something. afaik it's spring like the shield. So it shouldn't happen if it hasn't already.

 

[Acer-m14]

popped on Julie's G's FB and left a comment there .. if i get a answer i'll post it .. she shoots the M&P line ..

 

[libertysnake]

popped on Julie's G's FB and left a comment there .. if i get a answer i'll post it .. she shoots the M&P line ..

Even if it were a free floating firing pin, it doesn't mean it'll gunk up and cause problems. I mean, none of my AKs have EVER had a problem with their pins, and all of them are free floating.

 

[Edwardteach72]

It can' have a free floating firing pin,

It's a striker fired gun

So once the slide is fully locked back, the striker is now under spring tension mapping the striker back

 

[Calculon]

My M&P9 also does that. No problem for me. Saves me from having to slingshot the slide.

 

[Saltwater60]

The very design of the pistol makes that impossible.

It's just a cycle of the slide. Same thing that happens when you fire a round.

I thought so. Just wanted to check. I know some guy who shot his finger off in a slam fire situation. He was a pistol instructor at a course I took. Freaking moron was hotdogging around with a gun

 

[RugerGP]

My 9mmXDS 4.0 does that sometimes when I slam the mag in just right.

 

[71velle]

Normal on M&P and many others. I think the 2.0 wont do it tho.

 

[nortatoga]

They are designed to do just that! I kinda got into a discussion (argument) with a so-called gunsmith at a LGS finally told him call S&W and left the shop.

 

[nortatoga]

@Deplorable Me on another note if your son needs any more 10rd mags? Checkout 44mag.com factory 45 ACP 10 rounders for $17.00 shipping as low as $5.00, I got some 10rd 9mm mags from them a week or so ago for $13.00!

 

[Deplorable Me]

+1 .44 mag.

 

[Phazer]

This is a common thing in most auto loading pistols, you will not get a slam fire. Don't expect it to happen every time

If the pistol has a firing pin block, how could you get a slam fire? The firing pin can't travel forward enough to reach the primer without the trigger being pulled to release the block.

 

[Darth]

If the pistol has a firing pin block, how could you get a slam fire? The firing pin can't travel forward enough to reach the primer without the trigger being pulled to release the block.

He said "not?"