Glock guys…what happened here?

dlee12

dlee12

Hey big man, lemme hold a dollar.
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Picked this assembled slide and barrel combo up a while back, finally got around to shooting it.

Rockey Brass slide, P80 builder barrel.

Shot 10 rounds, 1 FTE, but then I noticed the primer on the one that didn’t eject.

7103277E-DFAB-4774-AB12-B2F018EE5417.jpeg

Looked a little closer at the slide, and the cover plate was bent/broken.

27129028-EECC-42B5-A89E-7A79610A55F4.jpeg

Stripped it when I got home, firing pin retainer was broken. The plunger also looks a little beat up.


7FA37D8E-3054-4B34-BC72-1DDEA7DC98E5.jpeg8DFB98DC-927A-47CA-84B4-C4C90B8551C3.jpeg


What gives?
 
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Over-pressure round? Clearly detonated and looks like it had enough pressure to pop the primer’s firing pin mark back out and cause all that damage down the firing pin channel? not sure though. glad you weren’t hurt by it
 
Dale Gribble said:
Where’d you get it?

I’d be going to somebody’s ass.
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Picked it up here on the forum, but I don’t think they ever used it. I’m gonna touch base with the manufacturer or just throw in a different upper parts kit.
 
More interested in the ammo. Looks like you got mixed head stamps so perhaps reloads? either way, the failure was from what looks like over pressure round.

The primer on the federal head stamp is normal for glocks. the fact that you have blown the back out of the other 2 in your photo means you should be glad its only your stiker assy that's busted and not your hand.

considering the two rounds with blown primers cycled the gun but the federal one was an FTE perhaps a mixed bag of ammo? what recoil spring are you running? it may very well be why your gun didnt blow up since it held those hot rounds in lock up a little longer.
 
maven said:
More interested in the ammo. Looks like you got mixed head stamps so perhaps reloads? either way, the failure was from what looks like over pressure round.

The primer on the federal head stamp is normal for glocks. the fact that you have blown the back out of the other 2 in your photo means you should be glad its only your stiker assy that's busted and not your hand.

considering the two rounds with blown primers cycled the gun but the federal one was an FTE perhaps a mixed bag of ammo? what recoil spring are you running? it may very well be why your gun didnt blow up since it held those hot rounds in lock up a little longer.
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Yeah, running reloads, but these were all loaded at the “starting” charge of 4.7gr of W231, 115 gr Berry’s on top. COL of 1.125”. Ran nothing but these all day in other guns.

Recoil spring is whatever it came with, just a cheapy plastic rod and spring.
 
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dlee12 said:
Picked this assembled slide and barrel combo up a while back, finally got around to shooting it.

Rockey Brass slide, P80 builder barrel.

Shot 10 rounds, 1 FTE, but then I noticed the primer on the one that didn’t eject.

View attachment 434400

Looked a little closer at the slide, and the cover plate was bent/broken.

View attachment 434404

Stripped it when I got home, firing pin retainer was broken. The plunger also looks a little beat up.


View attachment 434407View attachment 434408


What gives?
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Looks like you got the wrong firing pin buddy! I am a Glock armorer and that will kill a Glock. Just bc different model firing pins fit into different slides doesn't mean they will last.

If you didn't know, now you do, that Glocks CAN be assembled improperly and WILL still work, sort of. But it does not mean that they won't eventually self destruct.

That's the best 2cents I can give you
 
You said it was a P80 rocky brass slide? Then it was likely parts fit like Geezer said. It isn’t a Glock issue for sure if it is a P80 aftermarket slide and I say that being honest
 
Radar said:
You said it was a P80 rocky brass slide? Then it was likely parts fit like Geezer said. It isn’t a Glock issue for sure if it is a P80 aftermarket slide and I say that being honest
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I didn’t mean it to sound like a “Glock” issue. Maybe I should change it to “glock-based guys”

Just waiting on an upper parts kit, then we’ll see where we’re at.

I did weigh a handful my reloads against a handful of factory. Tenths of a gr of variance between each of them.
 
dlee12 said:
I didn’t mean it to sound like a “Glock” issue. Maybe I should change it to “glock-based guys”

Just waiting on an upper parts kit, then we’ll see where we’re at.

I did weigh a handful my reloads against a handful of factory. Tenths of a gr of variance between each of them.
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No i didn’t mean that defending Glock I am saying the Glock OEM parts are made within parameters for their slides and an aftermarket one is ever so slightly different then oEM parts can have issues of not fitting nor being too loose and cause problems. It sounds like a spring cup issue like @Geezer was talking about thou
 
Radar said:
No i didn’t mean that defending Glock I am saying the Glock OEM parts are made within parameters for their slides and an aftermarket one is ever so slightly different then oEM parts can have issues of not fitting nor being too loose and cause problems. It sounds like a spring cup issue like @Geezer was talking about thou
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Gotcha, yeah, hopefully it’ll be worked out with a decent parts kit, we shall see.
 
Glock armorer here too. I think its an ammo issue. it clearly pushed the case back enough to puncture the primer. Something shoved that firing pin back through the firing pin channel to destroy the back plate.
 
Sneakymedic said:
Glock armorer here too. I think its an ammo issue. it clearly pushed the case back enough to puncture the primer. Something shoved that firing pin back through the firing pin channel to destroy the back plate.
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Mike, I almost thought the same thing, but all my plinking ammo is loaded at the “starting load” of 4.7gr of W231. Shot 2 other guns (both factory Glocks) from the same batch with no issue. But to have 5 in a row out of the same mag out of the one gun, I’m at a loss.

Grabbed a random handful and weighed/measured them against factory loads, all within a few tenths of a grain, and thousandths of an inch.
 
dlee12 said:
Mike, I almost thought the same thing, but all my plinking ammo is loaded at the “starting load” of 4.7gr of W231. Shot 2 other guns (both factory Glocks) from the same batch with no issue. But to have 5 in a row out of the same mag out of the one gun, I’m at a loss.

Grabbed a random handful and weighed/measured them against factory loads, all within a few tenths of a grain, and thousandths of an inch.
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bizzarro. Glad you didnt lose an eye, or scratch that pretty face up. hahahahahahahah
 
A double charge of 231 isn’t all that rare. Keeping your eyes intact or your fingers working might be🤕
 
So…to bump up an old thread…..the issue ended up being the barrel….


I swapped it for a factory 17 barrel…250 trouble free rounds…(factory and reloads)

Put the out of spec barrel in another factory 17…for s’s and g’s) exact same issue…blown primers and a broken back plate, factory WWB.

Barrel manufacture said the best they could do was a discount coupon….no thanks. Barrel trashed, lesson learned.
 
dlee12 said:
So…to bump up an old thread…..the issue ended up being the barrel….


I swapped it for a factory 17 barrel…250 trouble free rounds…(factory and reloads)

Put the out of spec barrel in another factory 17…for s’s and g’s) exact same issue…blown primers and a broken back plate, factory WWB.

Barrel manufacture said the best they could do was a discount coupon….no thanks. Barrel trashed, lesson learned.
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Name names.
 
Wow, good follow-up.

Rocky Brass is gone BTW, if you didn't know. Made a order problem call in their final days and the person that helped me, helped me in spades, like a final goodwill gesture that may or may not been made with the owners blessing.
 
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dlee12 said:
So…to bump up an old thread…..the issue ended up being the barrel….


I swapped it for a factory 17 barrel…250 trouble free rounds…(factory and reloads)

Put the out of spec barrel in another factory 17…for s’s and g’s) exact same issue…blown primers and a broken back plate, factory WWB.

Barrel manufacture said the best they could do was a discount coupon….no thanks. Barrel trashed, lesson learned.
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Thanks for posting the follow up!
 
dlee12 said:
No movement that I could tell, but the chamber was super tight. Like plunk test it and it was stuck tight.
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Tight chamber combined with an oversize firing pin hole could cause what we see in the pictures-primer gives way and sends gas through the striker channel destroying the cups and backplate.
 
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