Greetings; new poster here! So, if this topic has been beaten to death in another thread, I apologize for the redundancy. (If such thread exists, I would appreciate it if one of you kind folks could steer me there.)
In my G19 Gen 5 (2000-3000 rounds thru at least), I recently changed out the stock guide rod and spring for a Tungsten set. Since then, when new mag is 'bumped in" while the action is locked open, the action often releases itself and slams closed into battery. Never happened before the swap-out, so that seems like a likely culprit. But this is simply not normal behavior for the gun (as one knows either from common sense or the ownerâs manual) and I want to count on the gun always acting ânormalâ â i.e., predictable.
Iâve heard from some folks that this is just what happens when you put some mileage on this gun. Iâve also considered the possibility that some gun oil or grease infected the contact point b/w the action and the slide-stop lever. Or, either the contact surface of the slide-lock (or the slide itself [hope not!]) has been worn down. If itâs the slide-lock, then itâs an easy and inexpensive replacement.
But bottom line is that I want to prevent this from happening, so I need to understand why it is happening in order to approach the problem. Any thoughts are more than welcome!
I can do this on purpose by putting my thumb on the slide stop and applying just a little downward pressure when inserting the mag. It shaves a little time when reloading from slide lock since you donât have to rack to get back in action. Some Glocks are easier than others but I havenât encountered one that wouldnât.
So if you donât want it to happen, make sure your thumb is clear when inserting the mag. If it still does it then I agree have a gunsmith look at it as just inertia shouldnât be enough to release the slide.
I consider that a feature. A Glock is not the only maker I can do that with. I also tend to slap the mags in, hard, to make triple sure they are seated. I can say though, even for me, it is not consistently 100%.
In general you should not be able to release the slide by slamming in a mag. If you can the gun is malfunctioning. After I am A$$uMEing that the mags are all one you have used previously with no issue. 3000+ rounds you may be in need of a âre springâ. That said you âchangedâ something.
Is your new recoil spring arching the slide away from the frame since it is stiffer? (I am a total noob to Glockâs but one of the first videos I saw was bending the FRAME, something about a pigs nose)
Has your mag release / spring become worn and the recoil spring is coincidental?
In general the slide lock lever is tight against the frame / slide interface and the action of driving in a mag SHOULD NOT engage it (mebby on an empty mag as the shelf is up) . I personally would address the issue so that it DOES NOT HAPPEN. I have seen too many young troops get used to slamming the mag and expecting the slide to go home on range guns and running into trouble in the real world both on pistols and rifle platforms.
On a totally different but related topic. Did the slide go home and the magazine fall out the bottom of the gun (or unseat) after the first round resulting in a Bang, Click scenario? Thatâs a whole different topic.
Craig6, when this happens, the magazine stays fully locked in; it has never fallen back out.
Sounds like I need some further data via experimentation. Trouble there is that my range, in my opinion, is unsafe viz. COVID, so I havenât felt good about going there.
(Then thereâs also the issue of finding 9mm rounds for less than a dollar per shot!)
Canât make my old gen3 g19 drop automatically without slight pressure on the slide release. But wouldnât mind if it did. I use the @Harvey method, though with the knuckle of my trigger finger since I am left handed. Speeds up my reloads noticeably. I practiced with snap caps until I could make it happen almost every time and make the move to rack the slide automatic on the rare times it doesnât. Cheap way to practice and test in these ammo challenged times.
OK, so I started by making the simplest and least costly attempt at a fix by ordering a new slide-stop lever. Problem solved. Looking at the old one now, I can see how itâs worn down. Iâve put probably no fewer than 4,000 rounds through the pipe, so that makes sense. A $16 fix after all those rounds amounts to an amortized replacement cost of $0.004/ round (40% of one cent). Iâd say thatâs a reasonable and cost-effective useful life for the original lever! And it turns out that I got the âextended lever.â I didnât intend to get that one, and itâs not something I ever had much interest in. However, after using the new one for an hour or so (dry firing), I fell in love with it! You know how there are certain things that once you get one, you canât remember how you lived without it? This is one; I have sweaty handsâŠ
Good for you!!! I donât normally advocate throwing parts at a problem but then again you canât know what âwornâ looks like until you have ânewâ next to it. Yes extended things often make you wonder âWhy didnât I think of that?â
4k rounds through a Glock should definitely not wear any part in the firearm to the point of malfunction. That is a manufacturerâs defect. Not worth fighting with Glock about it, but letâs call a spade a spade for a change.
Ken, I agree completely. And itâs one thing to replace a $20 part. Itâs another thing entirely if you have to have the slide machined â or replaced altogether!