Problem w/brand new Glock 48, is this correct?

[Vista461]

So I took my brand new blue label G48 MOS to the range.
More than half the time it would fire but wouldn’t go back into battery until the trigger was released.
You could feel and see the slide go the last bit forward as the trigger was released.

Prior to the range trip, I oiled it.

I’m attaching a pic, the sear area look different than my Gen3 G22.

Is it normal to have the tab over the part with the part number? My G22 isn’t like that.

When I got home I oiled it up some more and racked it a bunch of times and it seems better now than it was.
I ran about 170 founds through it. 115, 124 fmj and 124 gold dot and 147 HST.

Am I overthinking it? I just never had a Glock act like that before.

[RJ]

Hmmm...the G48 uses the G43/43X recoil spring assembly, does it not? Could be it needs some wear/breaking in?

Edit: Been a while since I messed with Glocks, but I believe you are looking at the correct placement of the cruciform into the trigger mechanism housing. The slimlines are like scaled down Gen 5's, and when put together correctly, they will look like that. PS Hopefully someone with current Glock knowledge can confirm/deny this.

[Gmac]

Yes perfectly normal. I believe all Gen 5 guns, and slimline, have this change.

[Ndbbm]

The engagement is correct for gen 5 and the slim line glocks.

Jason

[RJ]

Similar symptoms being discussed in 2021, here:

https://pistol-forum.com/showthread....-recoil-spring

I noticed the cycling had a sluggish feel to it when compared to ball ammo. This was especially noticeable when I would hold the trigger back and not reset it until the gun cycled. Whenever I did that, the slide would be a fraction of an inch out of battery and then fully return once I reset the trigger.

[1Rangemaster]

That is how Gen 5 Glock trigger bars look, from the G42 up to the 5th generation 10mms and .45s. This includes all 9x19s and the later "Slimlines": G42,43,43X and 48(iron sights and MOS).
They "flipped the script" starting with the G42. The "S" shaped coil trigger spring-looking at it from the right side-is now an assembly locking into the front of the trigger mech housing. To me, subjectively, the Gen 5s "feel" better. The Performance Trigger is another kettle of fish(and not currently available for Slimlines).
New pistols are tight, and that could be happening here. I would respectfully suggest cleaning it again, removing excess lube, and dry practice a fair amount. Check with live ammo on range again. Hopefully that works out for you.
For reference, I've had a 43X for a couple of years now. I have run a light mounted with no problems for me. It's has been a very accurate pistol in my experience.

Edit to add: the trigger system changes after Gen 4s, which are no longer in production. Gen 3s are manufactured for the socialist paradises like Cali...

[Vista461]

Ok I’ll give it a cleaning and shoot it some more.
I was hoping it was just some break in, but none of my polymer guns have done anything like that before, so I wanted to make sure.
It does seem better in dry fire today. I’ll do some more dry fire and go back to the range.

[G19Fan]

So I took my brand new blue label G48 MOS to the range.
More than half the time it would fire but wouldn’t go back into battery until the trigger was released.
You could feel and see the slide go the last bit forward as the trigger was released.

Prior to the range trip, I oiled it.

I’m attaching a pic, the sear area look different than my Gen3 G22.

Is it normal to have the tab over the part with the part number? My G22 isn’t like that.

When I got home I oiled it up some more and racked it a bunch of times and it seems better now than it was.
I ran about 170 founds through it. 115, 124 fmj and 124 gold dot and 147 HST.

Am I overthinking it? I just never had a Glock act like that before.

This is normal slimline has different trigger system

[ssb]

My brand new G48 MOS exhibited the same issue today at my first range session with it today. The gun was well lubed but I’ll confess to not cleaning it first. The gun has an EPS Carry mounted on a titanium DPP plate but is otherwise stock.

When testing with 147gr HST, I had two off-center light primer strikes that I strongly suspect were due to the pistol being slightly out of battery. The gun was very sluggish in cycling with 147gr HST. I noticed the issue occasionally with my 135PF handloads, but nothing like the HST was (every single round). The HST also nosedived in the mag once when dropping the slide with the slide lock. I do not consider it reliable with that load and stopped wasting ammo after 25 rounds. I’ll vet it with another JHP load (I went with 124gr standard pressure HST).

I detail stripped the gun and cleaned and lubed it this afternoon. I hope to be able to shoot later this week and am hoping that helped things some. I really want to like the gun.

[Vista461]

Small update.
It’s slightly better after a bunch of slide racking.
I emailed Glock and told them what’s going on this afternoon and they’ve emailed me a shipping label, so it’s going back home to get looked at. Hopefully it’s something simple and it gets fixed, because I like it and want to have confidence in it.
I was at my LGS and played with a new 48 MOS and it didn’t have the same issue, so I assume it’s just an out of spec part on my gun.