M&P Slide Release - A problem for IPSC
- Thread starter ol'blacky
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Henry The Yellow Dart
CGN Regular
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- Ottawa, Ontario
My buddy has an M&P and it's consistent about 98% of the time. At first he liked it, but after having used a P226 for work he'd rather NOT have the auto forward. It's interesting seeing the varying experiences people are having.
If you prefer the slide to drop and reload, load your ammo out as long as possible. The bullet hits the slide stop where it extends into the slide and releases it when you slam the mag in hard. If you don't want it to happen most of the time and reload set the bullet a bit deeper if you can and use less force when loading a mag. For competition I prefer the slide to drop.
Bob
Bob
I hate to say this but the CZ would serve you as a better IPSC gun. I have both and I even have a Beretta 92F that I used for the BB course and a couple of qualifiers. The problem with running the M&P is that you need to use a empty mag when you show hammer down. The RO needs to hear the click of the trigger dropping the sear. And if you modify this ? You can be disqualified because your not running a production firearm anymore. The other thing I hate to admit is, when running Tupperware hardware ? The better choice goes to Glock.
Best of luck deciding what to use...
Best of luck deciding what to use...
Did a field strip of the M&P40 to look at the slide-lock mechanism and realized, it has NOTHING to do with loading the bullets so that the top bullet sits as high as possible in the mag before inserting the mag. The slide lock mechanism is a pretty simple lever basically. It gets released by the slamming action. It seems that by having a fully loaded mag, you are now slamming likely with more force, as the mag is heavier. The heavy jolt is what allows the lever to slip out of its position.
Found some interesting info regarding this auto-slide-release. Apparently the large majority of them do it, but admittedly there are a few where it doesn't work consistently. This one case linked below, the guy says something similar, fully loaded mag, and it's more consistent. I thought like others it had something to do with the way the top bullet sat with more in the mag, but apparently it's weight, momentum and that some require more of a jolt to release than others.
https://www.youtube.com/watch?v=XP8PM-tciJc
Found some interesting info regarding this auto-slide-release. Apparently the large majority of them do it, but admittedly there are a few where it doesn't work consistently. This one case linked below, the guy says something similar, fully loaded mag, and it's more consistent. I thought like others it had something to do with the way the top bullet sat with more in the mag, but apparently it's weight, momentum and that some require more of a jolt to release than others.
https://www.youtube.com/watch?v=XP8PM-tciJc
has nothing to do with the weight of the mag. it has to do with physics. the slide weighs something, when you slam a mag in, or hit the bottom of the gun just right, with the angle right, the frame moves and since the slide isn't pinned in place it doesn't move with it perfectly so it gets released.
The physics you're talking has to do with the weight, or more accurately the mass. Conservation of momentum p=mv and and kinetic energy E=(1/2)mv^2 says that a heavier mass moving at the same speed carries more momentum and energy. So a mag of heavier weight or more accurately greater mass, with more bullets in it, should transfer more energy and momentum to the frame of the gun, which will accelerate faster as a result, being more likely to release the slide. It's not that the very last bullet is the be all and end all of whether this "function" works. But the mass of the mag should make a difference. And I noticed it too. The auto-slide release is far more reliable with a full mag than a partially loaded one.
Not really, it has nothing to do with the mag at all. But nice try. It has to do with objects at rest will stay at rest, you know those silly physics things. Which would be the slide when the gun frame is jarred. It is no more reliable with full mags compared to partial mags, unless you limp wrist the partial mags. Try it without a mag, works just fine. It's a first law thing not a second law thing.
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Oh, I know you can actually get it to work with no mag simply by jarring it. However, try it with a full mag and with no mag. Which one do you have to hit it harder to make it work? You're basically causing an "impulse" or a force delivered over a relatively short period of time. And in doing so, are generating rapid rates of acceleration, and thus momentum/g-forces. This rapid acceleration upwards cause the slide to be jarred loose. But hey, what do I know. I only have 3 degrees and am an engineer. If laws of conservation of momentum and kinetic energy do not apply here, I'm all open to a better explanation. If you'd like we can analyze the forces on the frame, slide and magazine and how they interact. But maybe this is just some of that "silly physics" you are applying to the situation.
The slide ends up auto closing because it doesn't move when the gun is jarred in a specific direction, either from a smack or a mag being put in firmly. It's the frame that moves, that allows the slide release to then drop and allow the recoil spring to then move the slide. Yes the slide may move in other directions due to the gun moving around during all of this. But the specific actions involved in causing it to drop are what is described in this post.
A heavier mag may move the gun frame more easily, but not enough that it makes any difference. The angle the gun is on and the direction of movement as a result of the insertion is what matters most. The frame needs to move forward, rapidly, to overcome the recoil spring and allow the at rest slide to be released.
A heavier mag may move the gun frame more easily, but not enough that it makes any difference. The angle the gun is on and the direction of movement as a result of the insertion is what matters most. The frame needs to move forward, rapidly, to overcome the recoil spring and allow the at rest slide to be released.
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