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  #1  
Old 10-24-2012, 8:13 AM
Cruznegao Cruznegao is offline
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Default Need advice for an AR that goes click instead of bang

I guess this is one of those "the cheap ends up being expensive" or "save money to spend money" examples. Maybe even a "See, I told you so".

Anyway, here is my problem, my AR goes "click", instead of "Bang".

About a year ago I decided to build an AR. Since I don't believe in the zombie apocalypse, do not expect to use it for self defense and am not really into the whole "mall ninja"stuff, I decided to go cheap, very cheap.

I ended up buying a stripped lower and an "A2 kit" from Blackthorne (akpartskits.com).

After I put the lower together I took the rifle to a range and... nothing. It just goes click, not bang.

I am pretty sure I put the lower together correctly and suspect that the problem is on the upper. Head space maybe???

I will most likely take it to a gunsmith to check it. But the whole thing cost me $575 and I am not really looking forward to spend a lot for something that is just going to sit there.

Do you guys have any idea on how much am I looking at to spend for a smith to take a look at?

Should I just sell the upper without the BCG?

Should I take the upper apart and put it back together and try again?

Take it apart and sell it to buy a new complete upper?

Buy a BCG?
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  #2  
Old 10-24-2012, 8:26 AM
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itisagoodname itisagoodname is offline
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Check hammer spring orientation. Very easy to switch and causes FTF... Click, no bang (and depending on ammo, sometimes inconsistent)
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  #3  
Old 10-24-2012, 8:32 AM
edgerly779 edgerly779 is offline
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What do the primers look like on failed rounds? Is the indentation very light? Pivot upper open and cock and fire to check how hard hammer falls. If not resounding click then it is in fire control group.
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Old 10-24-2012, 8:36 AM
ldsnet ldsnet is offline
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Borrow someone else's upper? Are there dents on the primer when attempting to fire?
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  #5  
Old 10-24-2012, 8:58 AM
Cruznegao Cruznegao is offline
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To be honest I haven't touched it since last December. Since we were in a group of friends I just put it aside and shot other guns that we had there.
If I remember correctly, when the upper is pivoted up the hammer works fine.
I'll check the spring and go from there
Thanks guys

Last edited by Cruznegao; 10-24-2012 at 9:11 AM..
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  #6  
Old 10-24-2012, 11:43 AM
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Just throwing this out there but I've heard of some carriers not working with some hammers and firing pins getting installed behind the cotter pin.

I'm not sure if either of those would explain your symptoms.

Since it's Blackthorne, the problem could be anywhere.

If you can't find an obvious problem (like hammer spring), first swap in a complete known good upper with BCG. If that cures it, put the old upper back on and swap out the complete BCG for the known good one, just compare the distance from bolt face to rear of bolt lugs to ensure the headspace is roughly the same. If the good BCG makes the old upper work, your problem is somewhere in the BCG.

If the known good upper doesn't cure it, your problem is somewhere in the lower.
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  #7  
Old 10-24-2012, 1:32 PM
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make sure your firing pin protrusion is .028 to .036 thousandths. that is duty spec.
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Old 10-24-2012, 1:52 PM
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post clear pics of the internals (trigger group, BCG, chamber, etc...) it may help to identify your problems...
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  #9  
Old 10-24-2012, 2:02 PM
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Quote:
Originally Posted by Mongoblack23 View Post
post clear pics of the internals (trigger group, BCG, chamber, etc...) it may help to identify your problems...
^^ This

But my money is on the hammer spring...
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  #10  
Old 11-15-2012, 9:27 PM
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KeeperOfColdSteel KeeperOfColdSteel is offline
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Hey Cruz, just wondering if you ever found out why your AR didn't go bang yet?
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  #11  
Old 11-16-2012, 5:23 PM
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Yep the springs should be checked first.
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  #12  
Old 11-17-2012, 12:22 AM
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Hammer Spring installed backwards, would be my first guess. Take a few Pics looking DOWN into the lower...
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  #13  
Old 11-17-2012, 7:15 AM
drkphibr drkphibr is offline
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OP did you resolve the issue? If so, what was it?
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