fte problem with ar15

[Honeybee]

Extractor is most likley the problem but check how tight the spent round is in the chamber.
if it is too tight there might be something gumming up the chamber like burnt varnish off cheap ammo or a slight burr on an edge.
You can rule out a burr if you look at a spent cartridge and see no scrapings on the outside of it.

This is where I would start looking.

 

[CAR-AR-M16]

Is this a recent problem? Has the gas tube been cleaned? Do you have another BCG that you could try?

Really no need to ever try to "clean" a gas tube. There is no spray or pipe cleaner that will remove anything that the 15,000psi of gas flowing thru it hasn't already blown free.

 

[kennedy]

How's the ejector functioning? Is it free or stuck?

The extractor is on the side of the bolt right? not the pin correct? if so the extractor is stuck...it has no movement at all

 

[kennedy]

Is this a recent problem? Has the gas tube been cleaned? Do you have another BCG that you could try?

I put my friends bolt in and it functioned flawlessly

 

[kennedy]

Extractor is most likley the problem but check how tight the spent round is in the chamber.
if it is too tight there might be something gumming up the chamber like burnt varnish off cheap ammo or a slight burr on an edge.
You can rule out a burr if you look at a spent cartridge and see no scrapings on the outside of it.

This is where I would start looking.

no burs, casing is not seized or tight in the chamber

 

[SMS]

The extractor is on the side of the bolt right? not the pin correct? if so the extractor is stuck...it has no movement at all

Right, but what about the ejector? You are getting extraction, but not ejection....check the ejector and see if it's in a bind; stuck fully depressed, stuck fully extended, stuck somewhere in between etc...push on it with a piece of spent brass. It should depress under pressure and spring right back when released.

 

[kennedy]

I don't think it's extracting the round...after the bolt cycles..the spent casing is still sitting in the barrel....not loose in the chamber...

 

[kennedy]

pin is free moving

 

[SMS]

Ooops. My fault...I misunderstood your previous statement...you said you weren't getting ejection (well you aren't, but because you aren't getting extraction first, LOL).

Take the extractor out of the bolt yet? Clean it and inspect the spring/pin/buffer (if you have an extractor spring buffer).

How many rounds do you have through this bolt/extractor?

 

[kennedy]