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 kchu02 
Member
Joined: Jul 2007  WI, USA
 Posts: 149 Feedback: 100% (8) |
Posted: 4/29/2012 10:45:31 AM
THE IMAGE ABOVE IS A PAID ADVERTISEMENT LRB lower + STAG/CMT LPK. When I got it back did some dry firing drills to test trigger. I noticed that when I pull the trigger then cycle the bolt to reset trigger that afterwards when I let pressure off trigger, it would fire while I was relieving pressure from the first pull. It would do this everytime. Is something wrong with the fire control unit? I have a Giessele S3G coming in the mail sometime next week, will this fix the problem? http://www.youtube.com/watch?v=rD2bo6K6iaE Gun does something like this, but with every cycle. Thanks, Kevin 
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TheRX7Project
Pepto Bismol
Team Member
Joined: Mar 2011 WI, USA
Posts: 2624 Feedback: 100% (2) Link To This Post |
Posted: 4/29/2012 10:58:12 AM
[Last Edit: 4/29/2012 11:01:54 AM by TheRX7Project]
New trigger will fix the problem.
MORE THAN LIKELY it is a spring problem, or the trigger/hammer is bad. ETA: Yes, something is definitely wrong with your FCG. I would contact Rainier about it. ETA2: http://www.ar15.com/archive/topic.html?b=3&f=66&t=550499 ETA3: I would take it apart if I was you, and definitely don't take it to the range like that. Could cause some problems... legal ones... |
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Posted: 4/29/2012 11:56:41 AM
Yeah I'm not going to fire it. It is going straight to my local gunsmith when my Gieselle Trigger comes in on Tues or Wednesday. That will fix it right? I should have them swap the disconnector spring and bolt hold open spring back too right?
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OsirisX
Digital Ninja
Team Member
Joined: Jul 2004 WI, USA
Posts: 910 Feedback: 100% (9) Link To This Post |
Posted: 4/29/2012 4:40:01 PM
[Last Edit: 4/29/2012 4:40:07 PM by OsirisX]
Originally Posted By kchu02:
Yeah I'm not going to fire it. It is going straight to my local gunsmith when my Gieselle Trigger comes in on Tues or Wednesday. That will fix it right? I should have them swap the disconnector spring and bolt hold open spring back too right? I would think with a new trigger you're GTG. |
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variable
Member
Team Member
Joined: Feb 2001 WI, USA
Posts: 2763 Feedback: 100% (91) Link To This Post |
Posted: 4/29/2012 4:46:08 PM
[Last Edit: 4/29/2012 4:54:54 PM by variable]
I had Mega lowers that did the same thing. You know the disconnector is catching the hammer disconnector hook because it holds when you keep the trigger held back. The problem is the reset release.
The most likely culprit would be the trigger nose (too short) or hammer trigger notch (not cut deep enough). I switched out the LPKs (Colt Mfr.) and the same thing happened. I check two other lowers with the same incident replicating itself. The problem was the hammer and trigger holes were drilled a tiny bit off (spread). LPKs were fine, the lowers were drilled out of spec.. I had to return all of the lowers. They made good, so I was happy. Just a possibility to check. V OUT |
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Posted: 4/29/2012 5:47:24 PM
Figured out the problem. It was a o ring wedged into the fcg.
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OsirisX
Digital Ninja
Team Member
Joined: Jul 2004 WI, USA
Posts: 912 Feedback: 100% (9) Link To This Post |
Posted: 4/29/2012 9:54:40 PM
Glad you got it worked out!
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WI57
Breath, Relax, Aim, Squeeze...
Team Member
Joined: Dec 2006 WI, USA
Posts: 7058 Feedback: 100% (15) Link To This Post |
Posted: 4/29/2012 11:12:38 PM
Originally Posted By kchu02:
Figured out the problem. It was a o ring wedged into the fcg. What was an o-ring doing in the FCG? |
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Posted: 4/29/2012 11:17:32 PM
I have no idea. I have nothing on the gun that uses O Rings. I guess it somehow found its way in there when the gunsmith at Rainier Arms was putting it together?
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Posted: 4/30/2012 12:02:50 AM
[Last Edit: 4/30/2012 12:55:02 AM by polymorpheous]
My guess is someone put it around the rear takedown lug on the upper to take up the slop.
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