New Colt 6920, something is wrong

[KL7]

In the last week, I purchased a Colt 6920 and decided before I took it to the range, I would take it apart to see if there were any glaring problems (and doing it just for fun). So after finding no problems and completely re-assembling it, I do a function test.

1) Pull charging handle and release
2) Pull the trigger and hold. Dry fires just fine
3) Attempted to pull the charging handle with the trigger held, the charging handle seems stuck.

I release the trigger and still can't pull the charging handle. I also cannot turn the safety on. The safety stuck in the fire position. I pull the pin and open it up. If I cock the hammer manually, everything works, except I cannot do a function check. Again, the charging handle seems stuck.

What am I doing wrong or is there something wrong with the gun?

[BPTactical]

In the last week, I purchased a Colt 6920 and decided before I took it to the range, I would take it apart to see if there were any glaring problems (and doing it just for fun). So after finding no problems and completely re-assembling it, I do a function test.

1) Pull charging handle and release
2) Pull the trigger and hold. Dry fires just fine
3) Attempted to pull the charging handle with the trigger held, the charging handle seems stuck.

I release the trigger and still can't pull the charging handle. I also cannot turn the safety on. The safety stuck in the fire position. I pull the pin and open it up. If I cock the hammer manually, everything works, except I cannot do a function check. Again, the charging handle seems stuck.

What am I doing wrong or is there something wrong with the gun?

I dont think it is anything you are doing. I just tried my 6920 a bunch of different ways and cannot get it to duplicate what you have going on.
The safety will not turn unless the hammer is cocked BTW.
Something is amiss, but I cant really make a guess without eyeballing it.
Check your PMs

[SA Friday]

Did you put the bolt retaining cotter pin in backwards? If so, it jams up the BCG. Also chech to make sure you don't have the bolt in to BCG upsidedown. Those are the two most common things I've seen.

[KL7]

OK, so I did a little more testing. I took the entire BCG out of my Delton and put it into my Colt. The DTI BCG would dry fire and function test just fine. I took my Colt BCG and put it into my Delton upper. The bolt stuck in the upper after a dry fire (same issue is happening on the Colt). So I have narrowed it down to a problem with the Colt BCG. I still haven't discovered why it is getting stuck. I sprayed some CLP into the chamber to see if the bolt was just a tight fit, but it didn't help.

BPTactical - thanks for the info on the safety.

SA Friday - The firing pin cotter pin is in correctly, nothing sticking out on either side to bind anything. The bolt is in correctly as well with the extractor pointing on the right hand side.

Any more guesses?

[MadRabbit]

Few questions- 1) Could you do a function check normally prior to the disassembly/reassembly? 2) Will the bolt retract nomally if you let it slam home, but do NOT pull the trigger? 3) Is your bolt carrier key tight, screws staked, etc.?

[KL7]

Few questions- 1) Could you do a function check normally prior to the disassembly/reassembly? 2) Will the bolt retract nomally if you let it slam home, but do NOT pull the trigger? 3) Is your bolt carrier key tight, screws staked, etc.?

1) No, the bolt would stick right out of the box. That kind of prompted me to do the disassembly.
2) I didn't try that, I 'll do that tonight when I get home. I'll lock the bolt back and let it release.
3) The screws are staked and looking good. When I examined the bolt, I looked for any obvious places where it would be binding (scraped metal), but I didn't see anything around the gas key or screws.

The only area I see that actually looks like metal on metal contract is the inside of the gas key where it meets the gas tube coming from the front. I wonder if the key and the gas tube are smashing together and locking up. That might be why it takes both arms to pull the bolt back and unlock it.