I had a cartridge blow in my 5.7 AR and it left the neck stuck in the chamber. How does one get it out without taking the barrel off?

I carry a broken shell extractor in my shooting stool for such an occurrence during a hi power match

Similar to this one

I don't see a 5.7 listed in the choice of calibers though :-(

Heat the chamber up on the outside with a torch to expand the barrel.  Tap the upper receiver on a workbench or floor and the neck should fall out.

Success.

I found it easier to just take off the barrel and use a tap.

Unless it is really really tight, a bronze brush on a cleaning rod inserted from the muzzle will often push it out with no disassembly required.

Metric or sae tap? Asking for a friend.

18 minutes ago, Zeke said:

Metric or sae tap? Asking for a friend.

12 minutes ago, PK90 said:

Details dude!

3 hours ago, Zeke said:

Details dude!

1/4" tap

20 hours ago, PK90 said:

1/4" tap

starter tap? common tap or bottom tap ? Asking for friend.

What thread pitch?

Was the round a reload.

How did it make you feel? Let’s explore that...

3 hours ago, silverado427 said:

Was the round a reload.

That'd be my guess. My co-worker was just telling me about this problem. Always a good lunch story from him about things he's seen and reloading topics.

https://www.amazon.com/UTG-223-Broken-Shell-Extractor/dp/B002TUSJZ2

Cheap 223 tool. Insert, lock the bolt, pull the bolt back and it yanks the case head out. Not sure about 5.7 though. It MIGHT work since 5.56 is just a hair smaller than 5.7.

I threw it over the berm. Problem solved.

49 minutes ago, PK90 said:

I threw it over the berm. Problem solved.

I thought that was just for live rounds