That is likely my next move this weekend.
Unless there is a better choice.

Your buffer tube retaining pin is popped up and blocking things.  If you can do so, optimal would be to try and get a very small punch or pick in there to depress it...hard to do I bet.


Beyond that, your option is to whack it with something non marking on the back of the BCG and drive it forward.  That should work pretty quick.  I would bet it won't damage it too much.

The buffer retaining post & spring are out of the rifle.  Fell out when I got the buffer tube off.
I will make sure that the hammer is NOT in the way.

This picture here shows the BCG far enough back that I think it is caught behind the hammer. You should be able to get it apart by removing the takedown pins and wiggling it around.

if you cant get it I will put together a piston bolt in the same setup and see what it takes to get it.

Nice rig. I would put down the hammer for now. I would not remove the FCG pins as this could cause further jamming. This picture may help, use the firing pin retaining pin as a point of reference. This gas key would be very difficult to drive as far rearwards as your pictures show so I assume your gas key tail has a different profile.

The hammer shown is in the cocked position. I've put a 0.1875 fiberglass rod on top of the bolt catch and between the bottom two bolt lugs. You may be able to use something similar inserted from the muzzle to depress the hammer enough to clear the carrier face while pushing the BCG forward.
Removing the pivot and takedown pins and sliding in a butter knife (smooth edges and pointed tip. not a table knife) behind the bolt catch, then slide rearwards, may also work.

This is what I have pictured as your problem

Good picture. After seeing this your absolutely correct the BCG can't be removed to the rear... my bad.

Edit:


It does appear the OP has a piston setup. Good observation!

It’s out!!
Pulled pins and everything came apart.

Lube recommendations?
Had been using SiG oil.
Anything you like.

I like geissele go juice. You can always just use a good clp.

My lmt piston setup was getting stuck in the buffer tube with buffer and spring installed. It appears to be the same finish as what is pictured. I sent it to lmt and they sent me a new one. the new one had the same issues. I ended up putting a damage industries buffer tube on the rifle and it corrected the problem. I think the coatings on the lmt tube and bcg stacked and caused friction. Just some additional info. My OCD wanted all lmt but it was driving me crazy.

Here is what I would do or at least from what I’ve seen.  Rule 1 of any stuck part gets AeroKroil.
If you do not have any your failed and need to buy some.  It’s really a amazing product and also a excellent bore cleaner as many BR shooters will also say. Next take a rubber dead blow hammer and tap on it( use wood block) Don’t beat it “yet”. Separate front pin if possible and wedge a Credid Card or equivalent to lower hammer which is probably wedged like the pic already posted.  Tap with dead blow once again.

If still stuck if personally be pissed off and would beat the shit out of it with zero regard of its value.  After broken I’d salvage what I could.  I don’t recommend that approach.  I’d recommend you take it to a gun smith or send back to factory.  Not me though I’d go Thor’s hammer.

I'll look into AeroKroil.
The BCG could be wiggled, so it was hung up on something.
The hammer was already lowered, it was not the hang up - I did confirm that before I pulled both pins.
I used rubber lightweight hammer on it previously to no avail.
I pulled pins and was able to get everything apart.
Never had to beat on anything.
The BCG was hung up on something.
The BCG was able to slide freely in the receiver after I got everything apart.
Tally one for my own education on what not to do when checking part fit.

Yeah, my mistake. Sorry.