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Posted: 5/14/2011 4:51:59 PM EDT
| Today was the first day for my new AR 15 to fire. The first shot turned out to be two shots and on a Semi Auto rifle in California, this is not good. I then loaded a round by hand and fired a single shot. I replaced the Magazine and tried again and again I fired a double burst. I thought maybe I installed the Hammer Sping incorectly, so I went and had a look at my Brother-in-laws rifle and Lower setup. It appeared to be exactly the same so now I dont know what to do.. Could someone please help me to get this rifle shooting one at a time so I dont end up in the Pokey. |
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Quoted:
Today was the first day for my new AR 15 to fire. The first shot turned out to be two shots and on a Semi Auto rifle in California, this is not good. I then loaded a round by hand and fired a single shot. I replaced the Magazine and tried again and again I fired a double burst. I thought maybe I installed the Hammer Sping incorectly, so I went and had a look at my Brother-in-laws rifle and Lower setup. It appeared to be exactly the same so now I dont know what to do.. Could someone please help me to get this rifle shooting one at a time so I dont end up in the Pokey. Disconnector function check: With the rifle unloaded and pointed in a safe direction, press and hold the trigger. Charge the rifle with your other hand, then VERY SLOWLY let pressure off the trigger. If you hear the hammer drop, then your disconnector and hammer have insufficient overlap, which will need to be fixed by adjusting or replacing the disconnector. |
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Sounds like the disconnector timing is off.......
Place the selector on FIRE (empty gun, double check, no mag). Pull the trigger and hold to the rear. The hammer should fall. Continue to hold the trigger to the rear, pull the charging handle to the rear, and release it. Release the trigger with a slow, smooth motion until the trigger is fully forward. The hammer should not fall. Pull the trigger. The hammer should fall. If the hammer falls as you release the trigger forward, the disconnector timing needs to be adjusted. |
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Quoted:
Quoted:
Today was the first day for my new AR 15 to fire. The first shot turned out to be two shots and on a Semi Auto rifle in California, this is not good. I then loaded a round by hand and fired a single shot. I replaced the Magazine and tried again and again I fired a double burst. I thought maybe I installed the Hammer Sping incorectly, so I went and had a look at my Brother-in-laws rifle and Lower setup. It appeared to be exactly the same so now I dont know what to do.. Could someone please help me to get this rifle shooting one at a time so I dont end up in the Pokey. Disconnector function check: With the rifle unloaded and pointed in a safe direction, press and hold the trigger. Charge the rifle with your other hand, then VERY SLOWLY let pressure off the trigger. If you hear the hammer drop, then your disconnector and hammer have insufficient overlap, which will need to be fixed by adjusting or replacing the disconnector. Beat me to it...... 
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If the rifle fails this function check, it is the disconnector...... easy fix.....
With the upper off the lower, pull the hammer all the way back with the trigger untouched, until you can get the hammer rear sear edge as close to the disco sear edge as possible. The free gap between the two should only be around .001 to .003 (thickness of a hair) with the trigger at rest. If the gap is greater than this, you will need to remove metal from the front bottom of the disco, where it seats/maxes out forward against the front top of the trigger. If you go this way, go slowly removing metal front the front bottom of the disco and check your progress often, since even a little metal removed from the disco will raise the disco forward at rest to close the gap quickly. |
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Here is how is should look / function....
Trigger Group Animation |
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Quoted:
Sounds like the disconnector timing is off....... Place the selector on FIRE (empty gun, double check, no mag). Pull the trigger and hold to the rear. The hammer should fall. Continue to hold the trigger to the rear, pull the charging handle to the rear, and release it. Release the trigger with a slow, smooth motion until the trigger is fully forward. The hammer should not fall. Pull the trigger. The hammer should fall. If the hammer falls as you release the trigger forward, the disconnector timing needs to be adjusted. sound like it to me too. i had the same problem with a dpms lpk, when i released the trigger to reset it would let the hammer slip and fire off another round. just switch out the hammer, disco and trigger to be safe. the parts aren't to expensive. |
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Rule # 1- Never post anything on a forum about your personal rifle doubling
If you are very curious about doubles and what to do about it, as far as troubleshooting goes, ask it in a completely hypothetical aspect. So, since your rifle is most definitly not doubling  , you would like to know what might cause a double if you were an unfortunate soul with an improperly running semi-automatic AR. Carry on....
ETA: Let's forget about this first post and move along in a less sticky direction. Welcome aboard. |
| Ok, the disconector spring was the problem, I took it apart again this morning and re-fitted the disco spring small side up and did the diconector test again and it seem to be working correctly 10 out of 10 times. Thank you everyone for your help and knowlege on this issue. |
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