feeding problem please help

[The Cable Guy]

From what the OP found out, the hard way, obviously there are some merit to the myth....

With 1 of the rings failed, that's what it take to make OP's gun not work.

Im still thinking its a short stroke due to the buffer.buffer spring.

[aplinker]

i just completely disassembled the bcg after removing the bolt half of a broken ring fell out of the carrier i am planning on purchasing a new bolt any advice on which one to buy and from where

What broke? The gas ring, the bolt, the cam pin?

Bravo Company will have what you need, except bolts - no one has those right now.

To diagnose short stroking put 1 round in the magazine and, with the bolt locked back, put the mag in. Fire and see if the bolt locks back itself. If not, you're likely short stroking.

[xnv733x]

Im still thinking its a short stroke due to the buffer.buffer spring.

how could this be possible and how can i check for this

[aplinker]

how could this be possible and how can i check for this

To diagnose short stroking put 1 round in the magazine and, with the bolt locked back, put the mag in. Fire and see if the bolt locks back itself. If not, you're likely short stroking.

You'll want to make sure that the bolt locks back on the empty mag when cycling by hand, first.

Check your buffer and see if it's marked "H" or "H2", etc.

[xnv733x]

what is the difference between the two

[1BigPea]

what is the difference between the two

It's the weight of the buffer, the higher the number the higher the weight.

Car std 3.0oz
Car H 3.8oz
Car H2 4.6oz
Car H3 5.4oz

[xnv733x]

how do i determine which one im supposed to use

[xnv733x]

i just looked at it there are no markings on it it came with my vltor stock also could the broken gas ringhave caused any damage to the bolt or carier and is it a bad idea to shoot it with a missing ring

[redcliff]

Visually inspect the bolt and bolt carrier for any gouging. The broken gas ring probably didn't hurt anything, although the question remains as to why it broke in the first place.

I personally would not shoot it with a broken ring, since likely the rifle will keep short stroking anyway till you fix it.

[xnv733x]

i didnt see any gouging as to why it broke im guessing it was due to the fact that the previous owner never cleaned it it was very dirty even the firing pin was pretty grimy

[ccmano]

I doubt the gas ring has anything the do with it... that said, make sure you replace all the rings, they're there for a reason.

I had the same issue a few years back with an Oly lower and an RRA National Match upper. On mine, the buffer system was the problem but in the way you might think. I changed springs and buffers with no improvement. I don't recall how but we determined that the screw that holds stock to the buffer tube needs to be vented. Early screws were solid and are still available. Late model screws are vented with a hole down the middle. The vent allows the air to escape as the buffer is pushed back into the tube as the bolt carrier recoils. The lack of a vent hole caused the air in the tube to act as a cushion causing short stroking. I changed the screw and the problem went away.

I'm not saying thats your problem, there are many reason for short stroking (so to speak) but is worth a look.

[Spyder]

Same problem with my SP-1 upper. Go check out that thread, posted earlier today for some more fixing advice. "SP-1 help, or something like that is the thread title.