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AR15.COM
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1/8/2011 1:44:32 PM EDT
Sorry for this being long but I need some help.
First off rifle is a mid-length lar-8
I brought the rifle home to sight it in this weekend. Before I did I put a new stock on the weapon, Magpul ACS.
When I made this switch I put a mil spec tube on the weapon. I was told I did not have to switch the spring that they were the same size ( between a commerical and mil-spec) which I now know is false.
So to the problem, I went shooting today and fired the first shot, after this it did not load the next shell, I though maybe it was cold or some crazy one time flaw, but no it did it for 5 rounds.
So I came home a switched the spring from another rifle that I have ( milspec) and went out to shoot, same problem.
Now I can see what the problem is. The bolt is not going back far enough to catch the shell to load it.
Is there anyone who can tell me what I need to do? I would really appriciate it.
1/8/2011 2:47:19 PM EDT
[#1]
Did you go from a rifle length stock to a carbine?  If so you'll need to change the buffer and spring.



If you originally had a carbine stock compare the buffer tubes - Are they the same length?  



Give me more details and I'll try to help.
1/8/2011 3:10:17 PM EDT
[#2]
Thank you. i would really like to get this up and running by tomorrow.
i went from a car 6 position, to a 6 positsion acs. when i first shot it i used the spring and buffer that it came with.
then when that did not work i tryed it with the mil spec spring and the buffer that it came with, when that did not work i tryed it with milspec spring and a buffer from an ar15, same height, but the ar15 is skinnier.
hope that helps
1/8/2011 3:28:44 PM EDT
[#3]
at first  after reading your post i thought buffer tub lengh also, but are you making sure that the  gas tube is lining up w the  gas  key so ur getting all the force that you need ? or in fact that the  front gass block is aligined  w the  hole in the barrel ?
1/8/2011 3:45:12 PM EDT
[#4]
thanks for the info, but i fixed it. when i changed the stock i tighten the buffer tube down to far, back it back one turn rifle runs fine. my own stupidity.
thanks anyways
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