BCG PROBLEM!!

[BaysicRyan]

Hello ALL,

Before I begin, I want to make this clear..Please do NOT make this thread turn into a thread about who has the best BCG!

So I purchased a Nickel Boron finish BCG from RGuns and when I put it in my receiver I noticed that it slides in freely but takes some force for it to come out . What are my options?

I found the part where its getting hung up on and I was thinking of taking some sandpaper to it and sanding it down. Is that ok to do?

I thought about returning it but I would like to hold on to it. Any recommendations would help.

Thanks,
Ryan

[FMJBT]

Is it a problem with the BCG, or maybe an issue with the receiver? Pictures would help.

[m16]

If the carrier is out of spec, return it before you damage your upper receiver.

[dung8604]

Hello ALL,

Before I begin, I want to make this clear..Please do NOT make this thread turn into a thread about who has the best BCG!

So I purchased a Nickel Boron finish BCG from RGuns and when I put it in my receiver I noticed that it slides in freely but takes some force for it to come out . What are my options?

I found the part where its getting hung up on and I was thinking of taking some sandpaper to it and sanding it down. Is that ok to do?

I thought about returning it but I would like to hold on to it. Any recommendations would help.

Thanks,
Ryan

I had a similar issue. Mine occurred when a mag was inserted. I determine that the channels that the mag ears rest in were out of spec. I decided to get a new carrier, and it is working much better while hand cycling. I took a dremel to the other carrier, but I don't feel comfortable using it. Anyone know if its a problem? I just ground out the little channels on the underside of the carrier.

Anyways, I say return it. Good BCGs are available for a fairly good price these days.

Sent from my One S using Tapatalk 2

[FeuerFrei]

Put the sanding materials/tools on the floor and step away.
Bolt lug contact area should be a precise fit, pulling the CH will move carrier, cam pin rotates/pulls bolt and it slides/turns out of battery.
New bolt in an upper will offer resistance when you retract the bcg w/charging handle.
Normal.
Where were you thinking of sanding?

[JNunez23]

Honestly, If you can still swap it for a new one..DO IT!

Don't waste your time trying to resolve an issue you shouldn't be worrying about anyway.

[BrassCase]

Is this for a new build or existing unit?

[autoduel]

Catching on the foward assist?

[RobGR]

Question have you ever owned an AR15? Wondering how familiar you are with the platform before I simply assume. Just wondering if you might be too concerned over nothing.

The BCG will "lock" into battery, so yeah, it won't be as easy to extract as when you initially slide it in. Where is the part that you are thinking of sanding?

And lastly, fully assembled, is it easy enough to charge your AR by pulling the charging handle back and releasing? Do not ride the BCG forward, release it and allow it to snap into battery. Repeat.

I've had slight rubbing on receivers/bcgs too, but that is with ARfranken builds and there isn't a problem after I run a few rounds through. However, with no name brands and all the parts people are coming up on, I have no idea what your build is made up of. Did you buy your built upper without a bcg, etc......

[BaysicRyan]

Maybe I should have been a bit more specific.

This is a new build, so needless to say it has never been fired and it does not have a barrel attached. This is not my first AR, so I know how they operate. The bolt and cam move freely in the carrier and and I've tried my other two BCM carriers in the receiver and they slide in and out of the receiver with no hang ups, that leads me to believe the the receiver is of correct specifications. When I say slide in and out freely, Im refering to just inserting the BCG into the receiver without the CH and they slide in when you tip the receiver down and they slide right out when you tip the recevier up.

With the nickel boron BCG, when inserted into the receiver with the CH, it slides in just fine but when removing, the carrier gets stuck on the inside of the receiver. The last time I did this, I inspected the carrier and noticed that there were rub marks on the left side of the carrier. They arent huge or deep marks, just tiny indications where the carrier got hung up. (Sorry I have no pictures).

I just figure ten minutes and a bit of sanding with fine grit would take care of the problem, but its sounding like I need to contact RGuns and get it replaced.

[ar15barrels]

Oil it and shoot it.
Report back if there is ACTUALLY a problem.

[Merc1138]

I just figure ten minutes and a bit of sanding with fine grit would take care of the problem, but its sounding like I need to contact RGuns and get it replaced.

NO.

Did you actually bother to lube it? Have you shot it yet to determine there is an issue? There is a distinct lack of mention of any sort of lube in your posts. Lubricate the part, then try it.

[Speedpower]

But.....but they said that there is no need to lube a Nickel Boron BCG's

sorry couldn't resist

[tal3nt]

Maybe I should have been a bit more specific.

This is a new build, so needless to say it has never been fired and it does not have a barrel attached. This is not my first AR, so I know how they operate. The bolt and cam move freely in the carrier and and I've tried my other two BCM carriers in the receiver and they slide in and out of the receiver with no hang ups, that leads me to believe the the receiver is of correct specifications. When I say slide in and out freely, Im refering to just inserting the BCG into the receiver without the CH and they slide in when you tip the receiver down and they slide right out when you tip the recevier up.

With the nickel boron BCG, when inserted into the receiver with the CH, it slides in just fine but when removing, the carrier gets stuck on the inside of the receiver. The last time I did this, I inspected the carrier and noticed that there were rub marks on the left side of the carrier. They arent huge or deep marks, just tiny indications where the carrier got hung up. (Sorry I have no pictures).

I just figure ten minutes and a bit of sanding with fine grit would take care of the problem, but its sounding like I need to contact RGuns and get it replaced.

Try it without the CH, like you did with your other 2 BCGs..?

[BaysicRyan]

NO.

Did you actually bother to lube it? Have you shot it yet to determine there is an issue? There is a distinct lack of mention of any sort of lube in your posts. Lubricate the part, then try it.

The way its getting stuck makes me think that lube is not going to make a difference but Ill give it a try.

Try it without the CH, like you did with your other 2 BCGs..?

I tried, same results.