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Posted: 8/9/2012 4:32:39 PM EDT
| Yesterday I purchased a colt ar15 in 5,56 at the same time I also purchased a complete colt top end in 7.72x39.Today at the range I was unable to fire a single round in the 7.62.The bolttttt would not go all the way into battery,it was at least 3/4" away from closing but the momentum of the bolt moving forward as far as it did caused a round to lodge in the bbl.Took the rifle home,got the round out and stripped the bolt carrier unit.the part that the fireing pin goes thru was very rough and seemed to bind up a little.Put it all back together and noticed that the grooves in the bolt face did not mesh with the groves in the bbl ramp.Now I did something very stupid according the ar book i was reading.I removed the fireing pin and retainer and put it bacl in the rifle,now I can't remove the upper from the lower.Any advice on how to get the top and bottom apart.AS FAR AS THE BOLT NOT GOING ALL the way forward the rifle will go back to colt to fix that part of the problem,the second problem is my fault but I need to get them apart before I send it to colt. |
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So you've pushed the take down pins and the upper and lower won't come apart, is that what I'm understanding? Try pushing the forward assist and see if the bcg is hanging one the buffer tube.
Never mind, I understand the issue. The cam pin is bound up on the inside of the upper. How far is the bcg stuck back in the buffer tube? Take the pins out and pull the upper forward from the lower and then pull up. |
| nO the bolt stays out of battery all the time,I can retract it normally but it will not go forward all the way.I understand why this is happening,the groves in the bbl ramp are not fitting in the groves in the fp part.My main problem now is how to get the top seperated from the bottom receiver |
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A buddy of mine did this with his OBR, and he shook it and played with it till the bolt rotated back on it's own... lots of frustration, but play with it... you will win. Yeah if that bitch doesn't want to run for you force it - especially when it comes to firearms |
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nO the bolt stays out of battery all the time,I can retract it normally but it will not go forward all the way.I understand why this is happening,the groves in the bbl ramp are not fitting in the groves in the fp part.My main problem now is how to get the top seperated from the bottom receiver Read my edit above. |
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bDaw998,do you mean the regular take down pins or are you talking about removing the stock? The regular take down pins. Push those out and trying moving the upper forward before pulling up on it. I'm assuming I understand your problem correctly. The BCG is stuck in the buffer tube right? If it isn't to deep, you should be able to move the upper forward on the lower and then pull up on it. |
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Quoted:
Quoted:
bDaw998,do you mean the regular take down pins or are you talking about removing the stock? The regular take down pins. Push those out and trying moving the upper forward before pulling up on it. I'm assuming I understand your problem correctly. The BCG is stuck in the buffer tube right? If it isn't to deep, you should be able to move the upper forward on the lower and then pull up on it. +1. if its out of battery 3/4" you should be able to move the upper forward enough to get it off. sounds like the bolt is not a 7.62 bolt. the 7.62x39 upper receiver came assembled by colt with the BCG installed? |
| Can the stock be removed while the rifle is in this condition?I have a feeling that the rear of the bolt is pushing into the buffer causing my upper and lower to be locked up.When the rear takedown is pushed out as far as it goes something is still in the way so that I can not pivit the upper unit open. |
| tHe bcg will NOT move forward any more than it presently is,it can be retracted but when forward the bolt face is against the bbl ramp.the groves on the bbl ramp and the groves on the bolt face are not aligned and that is why the bolt will not go into battery.That problem will be up to cot to fix but now I need to seperate the upper from the lower witch I can not do because I removed the fireing pin when I reinstalled the bolt. |
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tHe bcg will NOT move forward any more than it presently is,it can be retracted but when forward the bolt face is against the bbl ramp.the groves on the bbl ramp and the groves on the bolt face are not aligned and that is why the bolt will not go into battery.That problem will be up to cot to fix but now I need to seperate the upper from the lower witch I can not do because I removed the fireing pin when I reinstalled the bolt. The bolt cam has rotated out of position. |
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Quoted:
Quoted:
tHe bcg will NOT move forward any more than it presently is,it can be retracted but when forward the bolt face is against the bbl ramp.the groves on the bbl ramp and the groves on the bolt face are not aligned and that is why the bolt will not go into battery.That problem will be up to cot to fix but now I need to seperate the upper from the lower witch I can not do because I removed the fireing pin when I reinstalled the bolt. The bolt cam has rotated out of position. prob this. |
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Put your gun up on a table.
Put on some safety goggles. Put on some gloves and a long sleeve shirt. Put a big blanket over your head that covers you and the gun. Remove the castle nut. Unscrew the buffer tube and hopefully your body and/or the blanket will catch all the flying springs and detent pins. Slide the BCG out through the receiver extension. Then you should be able to separate upper and lower. |
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I've got a better solution.Just got off the phone with colt.They are sending me a shipping label and will fix both problems.Thanks for the many responses. Nice! Awesome to hear colts willingness to provide excellent customer support. And btw there is always a space after a period when starting a new sentence. Not trying to be a grammar nazi just letting you know if you didn't already. |
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Quoted:
tHe bcg will NOT move forward any more than it presently is,it can be retracted but when forward the bolt face is against the bbl ramp.the groves on the bbl ramp and the groves on the bolt face are not aligned and that is why the bolt will not go into battery.That problem will be up to cot to fix but now I need to seperate the upper from the lower witch I can not do because I removed the fireing pin when I reinstalled the bolt. Which is what I said above. If you would have done what I said further up on page one, you would have had the upper off last night. Let's revisit it, I said push out both pins, ie. the takedown pin and the pivot pin, and move the upper forward on the lower and then lift it up. |
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