Interesting AR failure

[dans]

My nephew brought his AR over because it had a case jam in the bolt and he couldn't remove it. When I looked at it, I noticed that when I tried to pull the case out it sprung back in. Afte rgetting the case out, we removed the BCG adn took a look at it. The bolt was installed upside down so that the extractor was pushing the case AWAY from the ejection port. I'm not sure where he got it from but it came pre-assembled and he just installed it.

The really interesting part is that I took a fresh BCG from my stock to compare it to. When I looked at this one, the ejector pin was non-functional. It was fully depressed and I couldn't get it to spring back out.

I'm going to be more diligent about checking fully assembled sub-assemblies from not on.

 

[bigblue]

That's a new one on me. The tolerances of the bolt would have to be pretty bad to allow the cam pin into the bolt backwards.

 

[45collector]

No shit. Wow. You take any pics?

 

[1903Collector]

Left handed bolt in a right hand upper?

Don't think you can put the bolt in upside down, the cam pin wouldn't go in...unless something was milled wrong.

 

[shanef]

I was thinking the same think - left handed BCG....

 

[TomMontana]

Who is the manufacturer for both BCG? I usually take them all apart to make sure it looks right and is spaced correctly with the barrel before using them.

 

[bigblue]

Who is the manufacturer for both BCG? I usually take them all apart to make sure it looks right and is spaced correctly with the barrel before using them.

Absolutely break down any firearm I buy before shooting it. I also don't buy DelTon shit and the like. Everyone has a bad day but the better companies invest in QA that catches most of those eff ups.

 

[1903Collector]

I was thinking the same think - left handed BCG....

It's not even the carrier, I have an old DPMS Southpaw (when they actually made good stuff) and I'm pretty sure the only difference is the ejector and extractor are just flipped.

 

[dans]

Left handed bolt in a right hand upper?

Don't think you can put the bolt in upside down, the cam pin wouldn't go in...unless something was milled wrong.

It was a right-handed upper and right-handed BCG. I was wondering if it was a lefty BCG, but it wasn't.

 

[1903Collector]

Then I would say you have some seriously out of spec parts if the bolt was put in upside down.

Just for giggles take the bolt out of the carrier and see if you can insert the cam pin from both sides.