Ar wont pick up next round

[akdov823]

So I'll try to give you as much info as I can, not an expert in language by any means.

Newly assembled silencer Co lower, topped with a aero complete 14.5 upper(mid length gas) with a new anderson complete bcg.
Luckily I had two rifles with me to verify what parts were not the problem.

Any ways I took the newly completed gun out yesterday. It chambered the round no problem, fires, and ejects the rounds fine, but doesn't pick up the next round. Rack another and repeat.

I swapped the bcg with another and it ran through the whole mag no problem. The confusing part was the brand new bcg works flawlessly in my older 16" rifle. So now i have no idea.

Any help? Thanks

 

[Lennypeters]

What ammo were you using? It sounds like it might be a little light and your bcg is short stroking.

 

[chris_1001]

Here we go again (no offense to the OP)…

 

[akdov823]

Here we go again (no offense to the OP)…

Shit i could not figure out how to phrase that in the search

 

[akdov823]

What ammo were you using? It sounds like it might be a little light and your bcg is short stroking.

 

[Lennypeters]

Only reason I asked was I thought you might have been using hand loaded ammo but obviously you are not.

 

[Lennypeters]

Here we go again (no offense to the OP)…

What am I missing here?

 

[chris_1001]

What am I missing here?

There was a recent thread where a guy needed AR help. We all offered suggestions and in person help and little came of it.

Hope this thread goes better

 

[akdov823]

Only reason I asked was I thought you might have been using hand loaded ammo but obviously you are not.

Nope, just off the shelf. I try to avoid the junk stuff, but that's as picky as I get.

 

[akdov823]

There was a recent thread where a guy needed AR help. We all offered suggestions and in person help and little came of it.

Hope this thread goes better

Me too

 

[chris_1001]

I’d say mag, but it works on your other gun. So maybe the mag catch is out of spec?

As in the mag is hanging too low on the catch?

 

[67ray]

If new BCG works, can we just swap it and call it done? End thread.

 

[Marty McFly]

If new BCG works, can we just swap it and call it done? End thread.

After the last thread, I'm with you 100%

 

[akdov823]

If new BCG works, can we just swap it and call it done? End thread.

I mean yes, I suppose, just wanted to figure out the root cause.

 

[akdov823]

I’d say mag, but it works on your other gun. So maybe the mag catch is out of spec?

As in the mag is hanging too low on the catch?

Thought about that, but it picks one up no problem with the charging handle

 

[chris_1001]

Thought about that, but it picks one up no problem with the charging handle

Recoil might be changing the dynamics? Long shot. But possible

 

[Marty McFly]

Any input @Joeldiaz

 

[Joeldiaz]

Any input @Joeldiaz

If you’re ok with the blind leading the blind, sure.

 

[1903Collector]

I swapped the bcg with another and it ran through the whole mag no problem. The confusing part was the brand new bcg works flawlessly in my older 16" rifle. So now i have no idea.

Any help? Thanks

Just spit balling here but are the BCG's the same, what I mean are they both FA types or is one a semi? Your 16" rifle probably has a carbine gas system? maybe that's why it worked in that gun?

 

[1903Collector]

There was a recent thread where a guy needed AR help. We all offered suggestions and in person help and little came of it.

Hope this thread goes better

Just sayin', I've been a good NES'r and keeping mine updated!!!

M4-ish build

Decided I wanted a no frills iron sighted M4-ish to go along with my A2 clone. Built up on an Anderson lower, ALG QMS trigger. Headspace is checked, just need to adjust rear sight for 50/200 and get it to the range for sighting in.

www.northeastshooters.com

 

[Boghog1]

Could be a slight variance in the tolerances of the BCG and the upper, when they get multiplied the firearm can be out of spec while the individual components are within tolerance. try swapping buffer and spring see if the BCG still fails

 

[Fixxah]

Swap uppers. If that does the same thing look at the buffer/spring. Just a wag.

 

[akdov823]

Ok I'm going to head to the range Tuesday or Wednesday and run these different combos people have suggested and see if I can narrow it down more. I'll have to research how to tell what style the used bcg is.

 

[Marty McFly]

Ok I'm going to head to the range Tuesday or Wednesday and run these different combos people have suggested and see if I can narrow it down more. I'll have to research how to tell what style the used bcg is.

Just take some photos for us too

 

[akdov823]

Just take some photos for us too

Ya I'll video it also, because it's ejecting, but I don't know if it's ejecting well or just dropping them out the side.

 

[whatluck]

check gas block alignment. also, any strange wear near the gas tube? is the gas key on straight and tight?

 

[EMTDAD]

hrm.. I was hoping this was a bar etiquette thread..

 

[akdov823]

hrm.. I was hoping this was a bar etiquette thread..

Nah I'm better at that than working in guns haha

 

[chris_1001]

hrm.. I was hoping this was a bar etiquette thread..

I don’t see your name on the guest list next Monday…

 

[akdov823]

Update, didn't have much time because I was concentrating on getting a prs gun dialed, but.... the new bolt is now cycling, but catching short on the last shot. When the magazine is empty the bcg is catching on the carrier instead the bolt face. I'll go back switch buffer springs.