Hello guys. I purchased a brand new Glock 26 Gen 5 MOS, cleaned and lubed the gun, added a Holosun 407 and Ameriglo sights and took it to the range today to run it.

Well, things did not go so well. I tried several different brands of ammo and the gun jammed 15-20 times. I have never had this happen with a new Glock and I have owned around 30 of them over the years. I’m thinking the springs may just need to be broken in so I will leave it locked back for a week or so and try it again.

This is why you test your gun before you carry it no matter the brand.

Ammo used was:

Federal HST 124
PMC 115 FMJ
Zero 125gr HP

The gun in question.






This is what was happening.

This message has been edited. Last edited by: usncorpsman,

Have you tried it without that big electronic tumor stuck to it?

quote:

Originally posted by parabellum:
Have you tried it without that big electronic tumor stuck to it?

I have not. I purchased it to be able to use the big electric tumor. Otherwise I would have purchased a regular 26. My eyes are too bad for iron sights anymore .

Well, send it to Glock. Either they'll make it function as it should, or they'll replace it.

take the holosun off and try it that way first. if you still have issues, have someone else try.
if everything works, add the optic back on and repeat.

or maybe try a different mag? or baseplate for your pinky.

could be a gripping issue

I have minimal experience even being around Glocks, but a complaint I first heard years ago was their vulnerability to “limp wrist” failures. That means that not only a firm grip is important, but as with other autoloading pistols, adequate slide speed is necessary for proper functioning. Adding the weight of a big optical sight to the slide obviously slows its movement, all else being the same.

All that being true, though, the problems you pictured are failures to chamber and I would expect those to be due to issues other than slide speed, such as an out-of-spec barrel.

And I agree that I wouldn’t try to fix a functioning problem like that with a Glock by myself. It should work first time, every time, without your trying to fix it.

Hard to tell from a pic but the feed angle looks odd. I would try a different mag or mags.

-Jeff

After unboxing, I do what you do. Lube and clean if needed. Then I work the slide about 100 times or so to ensure that the slide moves smoothly and freely.
PITA? Maybe. But you might try it. Your recoil spring may need a bit of break in.

Hey usncorpsman,
I had problems w/ my plain Jane Gen5 G26 using the soft 115gr. plinking ammo from Blazer for the first 300+ rnds. I've seen problems on yootube also w/ out of box G26s and soft range ammo.
I'm not sure if the 12 rnd. magpul mags I had in the mix had anything to do w/ this but all the hotter stuff like HST and Speer Lawman ran fine.

I note that your 124 HST had problems too so maybe your dot is contributing on top of this.
I would say go shoot it a bunch more before deciding what to do if you have the time and ammo.

What would cause it to fail like that? Slide not going back all the way (heavy RDS?). Recoil spring too strong? Mag spring too weak - slow loading the round? Round getting hung up at the chamber?

Any of the above? None of the above - other?

Tight grip, and try some +p 147 until it gets broken in a bit.

Does it do that with all of the magazines that came with it? (I think it's three now.)

You don't need to break in a Glock. Glocks work right out of the box. If they don't, something's wrong.

This is my 3rd G26 with a red dot. The other two ran 100% out of the box with the red dot installed. I’m going to leave the slide locked back for a week and try some stronger ammo.

I was also shooting my G19 and G17L both Gen 5’s and both wearing the same dot. If that 17L with the long a….s slide and barrel cycled with the same ammo, that 26 should have as well….lol

quote:

This is my 3rd G26 with a red dot. The other two ran 100% out of the box with the red dot installed. I’m going to leave the slide locked back for a week and try some stronger ammo.

If the other two ran 100% right out of the box, then why the problem with this one?

Problems due to low-powered ammunition, including lightweight bullets; excessively powerful recoil springs; inadequate lubrication and/or cleaning; and the infamous “limp wrist” almost always show up as failures to extract (i.e., pull the fired cartridge case out of the chamber) or failures to eject (i.e., throw the fired cartridge case out of the way of the next cartridge in the magazine). That is not what is pictured. Those stoppages are occurring after the fired cases are long gone.

If anything, once the autoloading firing cycle gets to the point of chambering a round, a more powerful recoil spring will actually tend to better overcome any hangup caused by a poorly manufactured barrel “feed” ramp.

Another thing that can cause a failure to chamber as pictured above is a problem with the cartridge case rim not slipping up and behind the extractor hook. But although I can’t be certain from the pictures, it looks as though the cartridge gets stopped before the case contacts the extractor.

Regardless of all that, and especially as your other similar models function properly, this should be an issue for Glock to correct.

quote:

Originally posted by usncorpsman:
This is my 3rd G26 with a red dot. The other two ran 100% out of the box with the red dot installed. I’m going to leave the slide locked back for a week and try some stronger ammo.

So, when it's time to change the RSA, or you try different ammo in it, you're back to having problems.

Glocks are ridiculously reliable. You have a problem Glock. Send it in and Glock will make it right, with either repair or replacement. Their customer service is second to none in the industry.

quote:

Originally posted by Chowser:
take the holosun off and try it that way first. if you still have issues, have someone else try.
if everything works, add the optic back on and repeat.

This is basic troubleshooting. If the FTF problem persists w/o the Holosun mounted, then you know the Holosun isn't causing it.

The G26 came w/ three mags. Did you experience FTF w/ all three? If so, then the mags aren't the problem.

Could be the barrel is out of spec, maybe a bad feedramp. A good thing about Gen5s is that they all share the same lock-up. Take a barrel from one of your other Gen5s, install it in the G26, and see if the FTF continues. If it does, then you can rule out the barrel. If it doesn't then the barrel is faulty.

And yes, you can use a G17.5L barrel in a G26.5. I ran a G34.5 barrel in a G26.5 before.

It helps to shoot w/ your hand on a rest to rule out limp-wristing.

Check to see that the screws used to mount the optic plate are not interfering with the extractor plunger assembly. If the screws used to mount the plate are to long they can make contact with the extractor plunger. This can mess up the cycling of the gun. I had the same issue in a Glock 45. As soon as I replaced the screw with a shorter one the problem went away.

The Holosun supplied screws are too long. The mounting hole on the right side of the slide is drilled through to the EDP channel. The tip of the screw is touching the EDP and causing issues with the extractor. Remove the screw and file/stone it about. 2-2 1/2 threads. Or contact Holosun and have them send you the correct screws. There is nothing wrong with the pistol.