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12/1/2013 1:43:15 AM EDT
Let me start by saying I hope everyone had a happy Thanksgiving!

Now to my issue...

Ibuilt apistol in 556 last year and it seemed to run alright, a couple light strikes here and there etc. This year I pulled it out if the safe and it will only fire one round then a light strike. I tried 3different ammo types and it was all the same.

It has aRRA bcg and a PSA fire control group. It also has a carbine buffer and spring.

Any ideas would greatly appreciated, thanks guys, and have a good weekend.
12/1/2013 2:46:21 AM EDT
[#1]
Just a guess here - but I'd read another post where this was happening (the light strikes and all) and it turned out that the hammer spring was installed backwards.

That should be easy enough to check.  Good luck, I hope it's that easy...
12/1/2013 4:30:08 AM EDT
[#2]
Check your gas rings on the bolt. This is the same problem I had.
12/1/2013 4:40:39 AM EDT
[#3]
Nice view of the orientation of the trigger/hammer spring.

Click me

Watch this before your next build
12/1/2013 11:58:22 PM EDT
[#4]
Quote History
Quoted:
Just a guess here - but I'd read another post where this was happening (the light strikes and all) and it turned out that the hammer spring was installed backwards.

That should be easy enough to check.  Good luck, I hope it's that easy...
View Quote


Often the cause.
12/2/2013 11:30:48 AM EDT
[#5]
I checked the hammer spring and its installed the same way as the other 2 ARs I did.

Could headspace be an issue with this?
12/2/2013 11:42:51 AM EDT
[#6]
If your really sure your springs are installed correctly, double check them.  So this pistol sat unused for a long period of time?  Time to strip it down and clean every nook and cranny followed by a generous dose of lube.  And while you have it apart closely inspect your firing pin and measure it too as it may just happen to be a bit short or the tip chipped.
12/2/2013 1:23:43 PM EDT
[#7]
Thanks forthe tips guys if nothing works I'lltry a new hammer spring. Won't be able to do much until the weekend though.

Hope everyone has a great week.
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