 ar15noober 
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Joined: Mar 2012  WA, USA
 Posts: 361 Feedback: 0% (0) |
Posted: 5/13/2012 11:41:06 PM
[Last Edit: 5/13/2012 11:54:31 PM by ar15noober]
THE IMAGE ABOVE IS A PAID ADVERTISEMENT Should mention its 20" |
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Posted: 5/14/2012 11:13:39 AM
not enough information.i'm assuming the rifle worked fine before the change. it doesn't fire OR it doesn't chamber the second round? if it does not chamber the next round, then the bolt isn't going far enough back to strip the next round from the magazine. this could be caused by the spring being too long for the buffer. did your friend use the spring and buffer out of the rifle extension in the shorter collapsable extension? all just guessing until more info is made available.
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Posted: 5/14/2012 11:36:03 AM
The new stock came with a new buffer and spring and buffer tube, he used all of it. The first round fires and chambers the second round but will not go bang it is a rifle length gas system i believe.
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Posted: 5/14/2012 11:58:10 AM
The buffer may be too light
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Posted: 5/14/2012 12:11:06 PM
[Last Edit: 5/14/2012 2:33:44 PM by Direct-Drive]
Originally Posted By ar15noober:
My buddy just replaced his old a2 buttstock with a tapco collapsible buttstock. The first shell fires just fine but the second shell doesnt fire, like the bolt wont close all the way. Buffer too spring too weak? Should mention its 20" Can you pull the charging handle back and lock it on the bolt catch ? You should fire it with one round in the chamber over an empty mag and see if the bolt locks back. It sounds like it's short-stroking and probably won't lock back on its own. If it worked with the A2 buttstock assembly it has to be something with the Tapco kit. Maybe they screwed up and placed a rifle length spring in the kit. Some airsoft crap is floating around and they use a shorter tube. |
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Posted: 5/14/2012 1:44:11 PM
Originally Posted By ar15noober:
The new stock came with a new buffer and spring and buffer tube, he used all of it. The first round fires and chambers the second round but will not go bang it is a rifle length gas system i believe. next question would be can he use the forward assist to finish locking the bolt on the next round? if by doing this the next round will fire then it sounds like the buffer and spring aren't doing their job locking the bolt forward in the chamber. use another buffer spring and buffer from a known good working carbine to see if problem goes away. |
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notso
Engineerish
Team Member
Joined: Oct 2002 AL, USA
Posts: 4587 Feedback: 0% (0) Link To This Post |
Posted: 5/15/2012 5:28:24 PM
[Last Edit: 5/15/2012 5:29:42 PM by notso]
I had a 20" do something similar.
The bolt was not cycling at full speed due to a loose gas key. Check that. I would be more sure if it was not ejecting the old round, but it might still be the case. ETA- Just noticed that this problem is post stock swap. Probably not the gas key, more likely some buffer or spring issue as noted by the other posters. |
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notso
Engineerish
Team Member
Joined: Oct 2002 AL, USA
Posts: 4588 Feedback: 0% (0) Link To This Post |
Posted: 5/15/2012 5:31:55 PM
Originally Posted By stratdragon92:
The buffer may be too light My first guess would be too heavy, not allowing the bolt to cycle with enough force. OP, how well is the ejection of the old case? If it really flings it, look at a heavier buffer If it just barely kicks it out, look for a lighter one. |
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