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12/28/2009 12:48:52 PM EDT
Took it to the range for the first time today (I've been working 6-7 days a week for a month) and had issues. I don't think it's anything to do with the upper.

When I pull the trigger it fires 1 or 2 times!!! Most of the time when a round is chambered it fires once, extracts, feeds another round but does not fire. When cycled manually it chambers another round and fires once, but every now and then it may fire 2 rounds. Things I noticed are 1) it seem to eject forward 2) if it fires once the round in the chamber has a dimpled primer like a light strike.

Is this a short cycle problem?

DSA upper
DPMS LPK
Essential Arms lower
DSA BCG (BCM on the way)
DSA 6 Position Stock, spring, buffer
12/28/2009 12:50:25 PM EDT
[#1]
Need to read the posts a little slower
12/28/2009 12:53:53 PM EDT
[#2]
Quoted:
Check the gas tube alingment




Uh, what does gas tube alignment have to do with the weapon doubling? I've got a pounding headache and can't make sense of some things at the moment, but I'm pretty sure about this one... Check your LPK installation, specifically the disconnector and disconnector spring. Big end of the spring goes down, into the trigger.
12/28/2009 12:55:46 PM EDT
[#3]
Quoted:
Check the gas tube alingment


Can you elaborate a little more?
12/28/2009 1:13:09 PM EDT
[#4]
Five bucks says you left out the disconnector spring... the little helical spring that goes inside the trigger.

- AG
12/28/2009 1:14:12 PM EDT
[#5]
+1 disconnecter and spring, also check disconnecter for any burrs.
12/28/2009 1:21:53 PM EDT
[#6]



Quoted:


Check the gas tube alingment
How is the gas tube alignment going to make a rifle double?





 
12/28/2009 1:49:42 PM EDT
[#7]
I 'm sorry i didnt read the whole thing I thought he was saying it would jam every 2 rounds

doubling I would say a crappy disconnector in conjuction with a improper Hammer mill cut.
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