9c4me Posted September 25, 2011 Share Posted September 25, 2011 Not every reload but, startled me the first time it happened during a match. Slapped in a full mag and the slide released on it's own, I thought cool and resumed shooting but wondered if this is even supposed to happen (like CZ?) Haven't figured what exactly causes it yet, seems to be mostly the angle which the reloaded mag is forced in. Saves a little time when it does happen but worried it might cause damage if the mag is hitting something that's making the slide lock release... Link to comment Share on other sites More sharing options...
Classic_jon Posted September 25, 2011 Share Posted September 25, 2011 Yes, both M&P's and Glocks will drop the slide if you insert a mag "firmly" and with a little bit of forward motion on the bottom of the mag. Link to comment Share on other sites More sharing options...
UTraab Posted September 25, 2011 Share Posted September 25, 2011 My M&P .40c does this as well, more often than not actually. I talked to a few people about it and was led to believe that it is a feature known as "auto forwarding" or "combat reloading". Looking at the M&P manual online, it says, in red, on page 16: WARNING: DO NOT USE EXCESSIVE UPWARD FORCE WHEN INSERTING A LOADED MAGAZINE INTO THE PISTOL. EXCESSIVE UPWARD FORCE COULD CAUSE THE SLIDE TO MOVE FORWARD, CHAMBERING A ROUND AND MAKING THE PISTOL READY TO FIRE. A quick internet search shows that quite a few autos do this. Hopefully someone who knows more will chime in. Link to comment Share on other sites More sharing options...
chirpy Posted September 25, 2011 Share Posted September 25, 2011 (edited) Don't know about the M&P but I have had it happen several times on my 1911's and just for the first time today on my CZ SP01 Pantom. Richard PS: Going to pick up an M&P .40 this week so we shall see. Edited September 25, 2011 by chirpy Link to comment Share on other sites More sharing options...
Sarge Posted September 25, 2011 Share Posted September 25, 2011 As far as the gun is concerned it won't hurt anything. Mine did it and my G34 does it. The real problem is counting on it to do it. You should avoid going to slide lock in the first place but when it happens it does save a ton of time if your slide will go forward when you insert a mag EACH AND EVERY TIME WITHOUT FAIL. The trick is getting it to do it reliably or training enough to know instantly when it doesn't. Another problem is that sometimes the slide will go forward and NOT strip a round into the chamber. That is another one of those things that will cost you dearly in mid stage. I would practice it at the range and see how reliable your gun is in both aspects before making it a habit. But proper stage planning and avoiding slide lock at all costs is still the best option of all. Link to comment Share on other sites More sharing options...
Remington4Life Posted September 26, 2011 Share Posted September 26, 2011 I thinks my m&p does it better than my glock 34 Link to comment Share on other sites More sharing options...
sniperfrog Posted October 5, 2011 Share Posted October 5, 2011 (edited) M&Ps have a problem with auto forwarding when you slam a mag in them. S&W lost some LE contracts because of this. Auto forwarding is not a good thing. Sometimes the gun won't pick up a round. This has happened to me a few times and it catches you completely off guard. I also carry a Sig 226 at work and it will sometimes autoforward but it has never failed to pick up a round. Edited October 5, 2011 by sniperfrog Link to comment Share on other sites More sharing options...
MGMorden Posted October 5, 2011 Share Posted October 5, 2011 It happens on my gun USUALLY. When I first got it I had some 10 round mags that would barely seat with the slide closed until you whacked it really hard. I've since switched to 17-rounders which don't have the issue, but I haven't gotten out of the habit of really driving in the mag, so when I actually shoot to slide-lock and I slam in a new mag the slide normally closes. Usually by that time my hand is already half-way to the slide so I just abort that when I notice its closed and continue on. I don't count on it, and I try not to shoot to slide-lock anyways, so it hasn't been that much of a problem for me. My understanding though is that almost every semi will do this if you slam the mag in hard enough. It mostly varies by the force required. Link to comment Share on other sites More sharing options...
rickn54 Posted October 6, 2011 Share Posted October 6, 2011 My M&P 40 Pro does it. At first I thought there was something wrong with it. Called Smith they said to send it in. I then decided to load some mags up with practice rounds and try in in my shop. I found that when you slammed the mags in at slide lock they usually go forward, both in a Glock and an M&P. I tried several different guns they all did it. It is my believe that the frames flex on the the polimer guns and the slides goes forward. Best to avoid slide lock. Link to comment Share on other sites More sharing options...
Steve Koski Posted October 6, 2011 Share Posted October 6, 2011 That's a feature, not a bug. You're reloading so you can shoot more, right? Koski Link to comment Share on other sites More sharing options...
jeep45238 Posted October 7, 2011 Share Posted October 7, 2011 Haven't found any gun that I can't do it on - assuming the pistol is charged using the slide stop not the sling shot method. If it's always been sling shotted, it'll depend on how well the slide stop and the slide cut are meshed. Link to comment Share on other sites More sharing options...
Fried Chicken Blowout Posted October 26, 2011 Share Posted October 26, 2011 All 4 of the M&P's I have (had) do it. For the most part I can count on it on my reload. It happens less if I'm only loaded to 10 rounds. Link to comment Share on other sites More sharing options...
DamonHP Posted October 27, 2011 Share Posted October 27, 2011 Mine does this every time. I use Arrendondo mag extensions and have 22 rounds in each mag (unless I'm at an IDPA match). I'm used to it, expect it, but am ready to hit the slide release if it doesn't happen. It won't harm your weapon. Link to comment Share on other sites More sharing options...
jcc7x7 Posted October 28, 2011 Share Posted October 28, 2011 This has been a very normal thing with the M&P. Never had any of mine not pick up the round on closing. Link to comment Share on other sites More sharing options...
mcracco Posted October 28, 2011 Share Posted October 28, 2011 M&Ps have a problem with auto forwarding when you slam a mag in them. S&W lost some LE contracts because of this. Auto forwarding is not a good thing. Sometimes the gun won't pick up a round. This has happened to me a few times and it catches you completely off guard. I also carry a Sig 226 at work and it will sometimes autoforward but it has never failed to pick up a round. Disagree. If your gun is not chambering a round with the mag fully inserted you have a mechanical problem with the gun or mag. But how in world can saving a second during a reload in a firefight be a bad thing? I (and quite a few others) practice reloads so the auto forward will occur and it becomes routine. Very handy feature IMO. Link to comment Share on other sites More sharing options...
throttleup Posted October 28, 2011 Share Posted October 28, 2011 I've shot my M&P Pro in IDPA competition for the last year. I estimate that my slide closes automatically 8 out of every 10 reloads. A great feature for a speedy reload! Unfortunately, every once in a while it does fail to strip a round out of the magazine. After the loud click, another few seconds are lost racking the slide and getting back on target. Over the course of a year though, I'm way ahead on time. Unfortunately that click seems to happen when I really need that stage! Bill Link to comment Share on other sites More sharing options...
Sin-ster Posted November 3, 2011 Share Posted November 3, 2011 Haven't found any gun that I can't do it on - assuming the pistol is charged using the slide stop not the sling shot method. If it's always been sling shotted, it'll depend on how well the slide stop and the slide cut are meshed. Interesting! My M&P 45 doesn't do it very often at all, with my Glocks being a lot more consistent but not nearly 100%. I power stroke them into battery 95% of the time. Anecdotal evidence, but it correlates! Link to comment Share on other sites More sharing options...
jeep45238 Posted November 3, 2011 Share Posted November 3, 2011 Basically, if the slide stop is used to get it into battery, the engagement surfaces between the slide stop and the slide will mate together and polish each other. The only gun I haven't been able to do it on is a single 1911 - and the owner always powerstrokes it. Every other pistol, easy peasy, japanesey. Link to comment Share on other sites More sharing options...
zach epstein Posted November 11, 2011 Share Posted November 11, 2011 my m&p 40 pro does every singe time, never fails, I thought it might stop when i started using taylor freelance 140's and it still does it, i LOVE it cuz if i go full blow retard and end up in a standing reload im a lil better off. People have told me that i should ignore it and still power slap it even if i does chamber a round so i dont rely on it..... i just nod my head and say thank you..... Link to comment Share on other sites More sharing options...
glknineteen Posted November 11, 2011 Share Posted November 11, 2011 Out of all the guns I've owned, the only one that I can't do this to is my 1911. I thought about what causes pistols to auto close or not, and I think it has to do with the weight of the recoil spring. That's the only thing keeping the slide against the slide stop, and if it's light, the bump from inserting a mag will jar the slide, causing the slide stop to release. I don't like it, personally. It distracts me, and it's not reliable. I'd much rather know that 100% of the time, I'm going to have to hit the slide stop, rather than be caught off guard. Link to comment Share on other sites More sharing options...
Sin-ster Posted November 11, 2011 Share Posted November 11, 2011 Out of all the guns I've owned, the only one that I can't do this to is my 1911. I thought about what causes pistols to auto close or not, and I think it has to do with the weight of the recoil spring. That's the only thing keeping the slide against the slide stop, and if it's light, the bump from inserting a mag will jar the slide, causing the slide stop to release. I don't like it, personally. It distracts me, and it's not reliable. I'd much rather know that 100% of the time, I'm going to have to hit the slide stop, rather than be caught off guard. Many people feel that hitting the slide stop is distracting and not reliable, as stress reduces you to your gross motor skills. Food for thought. Although I agree, if it's not stripping a round every time, it could be a liability/PITA. Link to comment Share on other sites More sharing options...
LikesToShoot Posted November 12, 2011 Share Posted November 12, 2011 My M&P 40 always chamber a round and I'm off to the races. My M&P 9 chambers sometimes, doesn't others and will stove pipe at times due to the top round jumping up slightly when the mag is "firmly" seated. I'm trying to teach myself not to count on this "feature" anymore. It sure is fun shooting the 40 and having the "auto" release working but a PITA when I have to clear a jam when I least expect it on the 9 mm. Link to comment Share on other sites More sharing options...
kv501 Posted November 14, 2011 Share Posted November 14, 2011 My M&P 40 always chamber a round and I'm off to the races. My M&P 9 chambers sometimes, doesn't others and will stove pipe at times due to the top round jumping up slightly when the mag is "firmly" seated. I'm trying to teach myself not to count on this "feature" anymore. It sure is fun shooting the 40 and having the "auto" release working but a PITA when I have to clear a jam when I least expect it on the 9 mm. I here you on considering this a feature. I have a pro that will close with the slightest bump. Add to that the adrenaline of a match and it's dead "reliable," if you want to call it that. I try not to run it empty, but on certain stages with a drop turn or swinger I have, and if you have to rely on it, then you're probably not the type of shooter who will benefit from the few hundredths that it will save (myself included). Last year at a sectional I did however do it on purpose to save a reload and it worked, but I would have cussed myself out if it didn't. Link to comment Share on other sites More sharing options...
Severian Posted November 15, 2011 Share Posted November 15, 2011 Not every reload but, startled me the first time it happened during a match. Slapped in a full mag and the slide released on it's own, I thought cool and resumed shooting but wondered if this is even supposed to happen (like CZ?) Haven't figured what exactly causes it yet, seems to be mostly the angle which the reloaded mag is forced in. Saves a little time when it does happen but worried it might cause damage if the mag is hitting something that's making the slide lock release... Yep. It's saves time on the reload! Link to comment Share on other sites More sharing options...
kv501 Posted November 15, 2011 Share Posted November 15, 2011 Not every reload but, startled me the first time it happened during a match. Slapped in a full mag and the slide released on it's own, I thought cool and resumed shooting but wondered if this is even supposed to happen (like CZ?) Haven't figured what exactly causes it yet, seems to be mostly the angle which the reloaded mag is forced in. Saves a little time when it does happen but worried it might cause damage if the mag is hitting something that's making the slide lock release... Yep. It's saves time on the reload! Just a couple points... 1. In Prod/L10 it's better for you in the long run to plan out your reloads and get better at studying/breaking down stages than to count on a quicker slide lock reload. Taking the easy way will make you lazier instead of improving your game. 2. What I think about -----> If I saved a quarter of a second 4 times in a match by counting on a slam lock I would save 1 second. If on the 5th time the slide fails to close, then I dry fire, then I stand there for a second to process what happened, then I rack it, I have negated any benefit from going to slide lock. Too many ways to have a meltdown when you start dealing with unexpected stuff. I didn't mean this post to be condescending, just wanted to show how I weigh the benefits/disadvantages. Link to comment Share on other sites More sharing options...
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