Ar-15 jam! Need advice from you pros

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Roussy06

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Hey I'm new to the AR platform. Today on my second time shootin my norinco cq10.5 the bolt seized shut on a live round and a could not fire it or eject it. I ended up having to use all my strength to pull on the charging handle and ejected the round. I then took the gun home and disassembled it. The firing pin was jammed solid in the bolt I had to pry and push to get it out. When it came out so did about 10 circle pieces of which I'm assuming is part of the primer. What's causing this to happen? And how can I stop it?
 
Sounds as if primers were perforating, with the little discs getting back into the firing pin hole. Is this what is happening? Did you inspect fired cases?
First thing I would do is try different ammunition.
 
Photos would help if you took any.

Did you look at the primers on the ammo you fired? If you're piercing primers (which might be what's happening) try a different brand of ammo.

edit: tiriaq beat me to it!
 
Ya that's exactly what's happening. I never inspected any casings. My first time shooting the rifle I did and they looked fine. I figure every round I shot today was perforated.
 
That is a fluke and a half right there.

Chances are that ammo is fine. Lots of people shoot it without any problems.

There might be something defective with your rifle and you firing pin is over protruding.
 
I am surprised to hear the ammo is the Norinco stuff, it has the harder primer & shouldn't be leaving any metal 'pieces' in the firing pin channel to jam it...

Hoping other guys chime in...

Cheers
Jay
 
Seen tonnes of rounds go through and AR's and only time seen this happen is after firing a krapload of blanks (fix of course kick starting it and lube).
Like everyone said try different ammo and more lube.
 
It's possible you have a firing pin that's too long, causing it to protrude too far out of the bolt.

Best bet would be to measure the firing pin with a caliper (I prefer digital) and compare that length with someone else's pin.

The Norinco ammo is supposed to have the harder mil-spec primers (commerical ammo primers are usually softer), but that could be a QC issue in that a batch of commerical-spec primers slipped in.
 
shredder said:
It's possible you have a firing pin that's too long, causing it to protrude too far out of the bolt.

Best bet would be to measure the firing pin with a caliper (I prefer digital) and compare that length with someone else's pin.

The Norinco ammo is supposed to have the harder mil-spec primers (commerical ammo primers are usually softer), but that could be a QC issue in that a batch of commerical-spec primers slipped in.
Click to expand...

This would be your starting point. Measure that firing pin. Then at least we can compare it to others here on the forum.

It appears Canadian Tire has calipers on sale right now, they are a good investment and come in handy as you get deeper into the world of guns.
ht tp://www.canadiantire.ca/AST/browse/6/Tools/MeasuringTools/SpecialtyMeasuring/PRD~0586800P/Mastercraft+Digital+Caliper.jsp?locale=en


I've fired lots of non millspec primers in my machine with no problems. I reload, use nothing too soft, CCI mostly.
 
That's what I'll do. Ill let ya guys know tonight after work. I bought it from another member who has been great and giving me advice through this as well. Also said that if I can't get it functioning properly he will give me a refund. Which is a huge relief as I only have 83 rounds through it.
 
1)Has the bolt been properly disassembled, cleaned, and lubricated to start?
2)Is the firing pin bent. Rollout on a table and look for wobble.
3)Firing pin protrusion. What is the measurement?
 
Ya I never touched it since I just purchased the rifle and upon inspection it looked clean and well lubed. I have since disassembled the bolt and taken out the firing pin. I cleaned everything trying to find carbon build up.But with only 300 through it from previous owner and 83 from me there wasnt anything to be conecered about. The firing pin did not have a wobble to it. I have since reassembled everything with plenty of lube. Hopefully I'm done work early enough to get to try it out again. I'm a little nervous to though because its no fun trying to get a live round out with the bolt seized shut.
 
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