BCG is extremely tight

[Jonathan Waits]

Hey there, so I got my new upper and BCG in today, and I am having a bit of trouble, the bcg, once in the forward position is EXTREMELY tight, I don't know if I just need to shoot it and that will get it loosened up, or if it is even safe to shoot?

 

[Jonathan Waits]

I almost have to take a hammer to it to back it out of the chambered position.

 

[Bob Sanders]

First thing is to get a chamber brush and make sure chamber and lugs are clean. Someone else will have to take over from here.

 

[Burk Cornelius]

First thing is to get a chamber brush and make sure chamber and lugs are clean. Someone else will have to take over from here.

You're like a gunsmith, or something. .....

 

[Squid]

Can you see the key on your barrel extension? Take off your handguard and see if it looks centered in its Grove in the reciever.

 

[desert_gypsy]

Check for wear marks on the bolt lugs. If they're horribly uneven, put some lapping compound on them and cycle the action until it smoothes out. She'll straighten out with some trigger time, but the lug lapping will expedite the process.

 

[Travis Colford]

if it is to tight try more lube that works for most problems like this in life.

 

[Jonathan Waits]

I cant see any kind of key on a barrel extension, the delta ring covers everything, I did notice the gas key on the BCG looks a little marred but not much, I don't see any wear on the bolt lugs, but it feels like its too tight going in and out of the chamber.

 

[Jonathan Waits]

Should I even try shooting to see if it loosens up? Or just wait till monday and call PSA?

 

[Dustin Cantrell]

Can you see marks inside the upper where the carrier rides? Did you assemble the upper or buy it assembled? I wonder if the receiver is tweaked.

Might remove the bolt from the carrier and insert the carrier in the receiver and see if it's still really tight. If so, I'd think it'd be a tweaked receiver.

 

[Jonathan Waits]

No marks, I think the keyways on the bolt are not rotating quite right.

 

[Squid]

Can you rotate the cam pin 360 degrees with it all the way in?

 

[Jonathan Waits]

You mean on the bolt itself? Yes, as long as the firing pin is out, the bolt and BCG itself look fine, it disassembles fine as well, I am wondering if the chamber keyways/lug holes/feed ramps, whatever they are are in the correct position or are even wide enough, or if my bolt lugs/keys are not lining up or are too big.

 

[Jonathan Waits]

So just to describe what is happening a little better, it takes a bit of force to send the bolt home, then, when I try to pull it back out, it will come to the extension edge and unlock the bolt just fine, but that is where it sticks, I then have to get a dowel and hammer and force it back out.

 

[Rustyzx9]

Do you have another rifle that you could swap some parts out of to try to determine where things are going wrong? Trying a different bcg in your rifle and your current bcg is another rifle might help narrow things down. I'd be happy to volunteer one of my rifles if it would help.

 

[Jonathan Waits]

Thanks Rusty, I took it down to sooner state pawn N, and Josh helped me out, we tried a completely different bcg, and it worked just fined, then we tried the bolt from that bcg in my carrier and still worked, so we determined that the lugs are just enough too big to be causing that much of a hang up. So I am going to call PSA on monday and see if there is anything to be done, if it was actually milled wrong or if thats just the way it is and I should try some heavy rounds in it combined with the lapping compound. I would figure its something actually wrong, I mean that much resistance shouldn't be there.

 

[Rustyzx9]

It sounds like something is wrong. I've never had a rifle with those kinda of issues, and I can't say that I've heard of anything like this before. Things should run nice and smooth with nothing hanging up.