AR Sponsor
Posted: 3/9/2013 10:01:12 AM EDT
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I recently just build my first rifle. I used a 16" complete upper from JSE, a MAG tactical systems lower, DPMS lpk, and a Magpul STR stock. After lubing the gun today, I took it out to shoot for the first time. I was able to shoot one shot then I got a click. It was also hard to pull the charging handle back to get the unfired round out. This happened a few times then it would shoot twice and do the same thing. I tried to different pmags and it did the same with each.
The left is a FTF and the right has been fired. 
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no problems since.
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Quoted:
I recently just build my first rifle. I used a 16" complete upper from JSE, a MAG tactical systems lower, DPMS lpk, and a Magpul STR stock. After lubing the gun today, I took it out to shoot for the first time. I was able to shoot one shot then I got a click. It was also hard to pull the charging handle back to get the unfired round out. This happened a few times then it would shoot twice and do the same thing. I tried to different pmags and it did the same with each. The left is a FTF and the right has been fired. http://i1142.photobucket.com/albums/n620/rblaker/B1D97E03-96A5-4719-8228-434B4297E8F9-3128-000001B20402BAEA.jpg http://i1142.photobucket.com/albums/n620/rblaker/DB535813-0DB6-4CC0-84B0-9B9A70594E26-3128-000001B155768957.jpg http://i1142.photobucket.com/albums/n620/rblaker/B9F8D62C-D604-439F-ADEE-44139CD82FA0-3128-000001B146CF5BE7.jpg It's not extracting the spent cases after cycling just far enough to reset the hammer, but not far enough to extract and pick up a new round. First thing, completely disassemble the BCG and clean it as well as the chamber very thoroughly, then lube it generously with CLP. A few quick questions: Does it manually cycle easily on an empty chamber? Are you using reloads by chance? What type of gas block does your upper have? |
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Quoted:
Quoted:
I recently just build my first rifle. I used a 16" complete upper from JSE, a MAG tactical systems lower, DPMS lpk, and a Magpul STR stock. After lubing the gun today, I took it out to shoot for the first time. I was able to shoot one shot then I got a click. It was also hard to pull the charging handle back to get the unfired round out. This happened a few times then it would shoot twice and do the same thing. I tried to different pmags and it did the same with each. The left is a FTF and the right has been fired. http://i1142.photobucket.com/albums/n620/rblaker/B1D97E03-96A5-4719-8228-434B4297E8F9-3128-000001B20402BAEA.jpg http://i1142.photobucket.com/albums/n620/rblaker/DB535813-0DB6-4CC0-84B0-9B9A70594E26-3128-000001B155768957.jpg http://i1142.photobucket.com/albums/n620/rblaker/B9F8D62C-D604-439F-ADEE-44139CD82FA0-3128-000001B146CF5BE7.jpg It's not extracting the spent cases after cycling just far enough to reset the hammer, but not far enough to extract and pick up a new round. First thing, completely disassemble the BCG and clean it as well as the chamber very thoroughly, then lube it generously with CLP. A few quick questions: Does it manually cycle easily on an empty chamber? Are you using reloads by chance? What type of gas block does your upper have? I was able to shoot one shot then I got a click. It was also hard to pull the charging handle back to get the unfired round out. The Gas block might be an area? not sure however their are smarter people than I in here. we will get you some help. Bump to keep it up. |
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Quoted:
Quoted:
Quoted:
I recently just build my first rifle. I used a 16" complete upper from JSE, a MAG tactical systems lower, DPMS lpk, and a Magpul STR stock. After lubing the gun today, I took it out to shoot for the first time. I was able to shoot one shot then I got a click. It was also hard to pull the charging handle back to get the unfired round out. This happened a few times then it would shoot twice and do the same thing. I tried to different pmags and it did the same with each. The left is a FTF and the right has been fired. http://i1142.photobucket.com/albums/n620/rblaker/B1D97E03-96A5-4719-8228-434B4297E8F9-3128-000001B20402BAEA.jpg http://i1142.photobucket.com/albums/n620/rblaker/DB535813-0DB6-4CC0-84B0-9B9A70594E26-3128-000001B155768957.jpg http://i1142.photobucket.com/albums/n620/rblaker/B9F8D62C-D604-439F-ADEE-44139CD82FA0-3128-000001B146CF5BE7.jpg It's not extracting the spent cases after cycling just far enough to reset the hammer, but not far enough to extract and pick up a new round. First thing, completely disassemble the BCG and clean it as well as the chamber very thoroughly, then lube it generously with CLP. A few quick questions: Does it manually cycle easily on an empty chamber? Are you using reloads by chance? What type of gas block does your upper have? I was able to shoot one shot then I got a click. It was also hard to pull the charging handle back to get the unfired round out. The Gas block might be an area? not sure however their are smarter people than I in here. we will get you some help. Bump to keep it up. Yup, just realized I misread "unfired" round. |
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Quoted:
Yes it cycles pretty easily without the round in. I'm using ammo from Freedom Munitions. And the gas block is just a single rail gas block imprinted with BTE USA. Skip the part about the gas block, I misread your post and mistakenly believed that you had a spent case that was difficult to extract. There are a few things that can cause this. Are you sure that it is going fully into battery when this issue occurs? |
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Your hammer spring is probably in wrong. eta: your unfired case on the left is dimpled from the free floating firing pin, normal in the AR. your fired case on the right, although it fired, show a light strike. Check the orientation of hammer spring. FIFY no pics of inside lower so its just a guess at this point but thats what i would look at first too. have pics of inside lower with fcg installed as they are now? |
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Need to back this up a bit., and make sure that the rifle has been fully cleaned (including the chamber with a chamber brush by hand), and the upper bearing areas lube with CLP.
How single loaded round in a mag, lock the mag home, charge the round while leaving the mag in the rifle,then fire that round. If the rifle is cycling correctly, then the bolt should lock back on the catch (catch in front of the bolt face, and not just holding the bolt back via the bottom of the carrier. If the bolt does not lock back, then try some other factory ammo. Next, pull the Bolt off the carrier and with the carrier alone (leave the key on it) dry fit the carrier to the upper until the front of the carrier touches the back of the barrel extension. Now back about a inch before the two met, the gas tube entered the carrier key, and here you are checking the alignment of the two. Hence, the tube should enter the key cleanly, and if not, then the gas tube will need to be tweaked to adjust the alignment. Also, make sure that the carrier glides in the upper receiver, and that the key is not too wide and binding up in the upper receiver track. The fact that you are getting a first load ignition, and then a click, tells me that the FCG sounds fine, but that the bolt is not fully locking closed on the second round, with the back of the carrier blocking the FP from reaching full protrusion. Best guess, weak cycle and maybe a gas tube not aligned correctly, and why the bolt is not fully locking up. As for the bolt fully locking up, the front of the carrier should be tight against the back of the barrel extension. |
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