AR Fail zero bcg problem

[Kirkhan7]

I've had ARs since I was 18 and in the past few months I had the bug to build a few more. I usually run nickel boron bcgs. Well I built a RR and took it to the range the other day and got 4 rounds through it and then the bcg wouldn't fully go into battery, thus I used the forward assist. I bought a fail zero for the first time and I'm asking if anyone knows if they have a certain break in point and I just need to keep shooting to break it in as that has been suggested to me. Any feedback or personal experiences would be great.

 

[Sheepdog Gear]

Did you build the upper, or buy a complete upper to throw on your built lower?

 

[Kirkhan7]

Built it sir

 

[mvician]

How about some more information?
Ammo?
Did you oil the BCG?
Mags?

 

[Kirkhan7]

Pmags. I did oil the the bcg. And it was wolf gold 223 brass cased

 

[tonybia]

Have you taken the bcg apart to inspect it? Did you inspect it prior to assembly?

 

[Kirkhan7]

Yea I did before I went shooting. It's brand new I did not notice anything out of the ordinary. I'm just thinking I need to put a couple hundred rounds through it to break it in, but did not know if anyone else had a similar experience with fail zero

 

[7.62]

I have had NiB BCGs including fail zeros on my ARs over the years and never experienced any problems with them. I have never had or heard of a break in period with them. Do you have another BCG you could place in it to see if it gives you the same problem? As other stated there are a lot of things that could be a factor but it's hard to say. But I doubt it's an issue of "breaking it in"

 

[Sheepdog Gear]

I have had NiB BCGs including fail zeros on my ARs over the years and never experienced any problems with them. I have never had or heard of a break in period with them. Do you have another BCG you could place in it to see if it gives you the same problem? As other stated there are a lot of things that could be a factor but it's hard to say. But I doubt it's an issue of "breaking it in"

Very good advice if you can do it. Will help weed out possibilities.

 

[SpaldingPM]

Check clearance on where your gas tube goes into the BCG. If its off center by just a fraction, it can sometimes cause enough friction to keep he bolt from going into battery.

 

[vitamink]

what kind of oil are you using on the bolt? Some aren't made for rifles and evaporate instantly when you start shooting leaving a gunky residue. I like slip2000 for my rifles.

 

[Kirkhan7]

Solid thanks guys I appreciate it. Ill throw in a back up cmmg bcg I have an see how that runs. And I put in about 3 or 4 drops of hoppes before I shoot.

 

[M67]

Hoppes...

and there's the problem

 

[Sheepdog Gear]

Hoppes...

and there's the problem

+1. Ha ha!