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Posted: 10/20/2013 5:44:23 PM EDT
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Mega forged upper
Ice Arms stainless barrel (Green Mountain) Diamondhead VRS-T handguard Today was the last day of assembly. Added the gas tube and block and noticed that it looked like the barrel wasn't straight. If you were looking from the back of the gun towards the compensator, it pulls to the left. http://img.photobucket.com/albums/v202/jberens/IMG_1427.jpg http://img.photobucket.com/albums/v202/jberens/IMG_1430.jpg http://img.photobucket.com/albums/v202/jberens/IMG_1431.jpg The gas tube appears to be a bit twisted due to the alignment http://img.photobucket.com/albums/v202/jberens/IMG_1432.jpg In this picture the straight edge is aligned with the upper rail and the black line you can see near the compensator is parallel and you can still see the offset http://img.photobucket.com/albums/v202/jberens/IMG_1433.jpg I then reinstalled the handguard and the straight edge lined up with the rail of the upper and the handguard so I think this rules out the handguard being crooked. http://img.photobucket.com/albums/v202/jberens/IMG_1434.jpg Here is the view from above http://img.photobucket.com/albums/v202/jberens/IMG_1435.jpg I saw a few threads that spoke of using a lapping tool. how do I know if it's the barrel or the upper? Depending which it is, should I take this up with the manufacturer or try to fix it myself? |
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Thanks for the suggestion. Did exactly that and here's what I got:
Used a T square with the bottom of the barrel sitting on the base of the T and the flange of the barrel touching the upright of the T http://img.photobucket.com/albums/v202/jberens/9804771D-19B2-4818-8119-9CE42A487CEE-1074-000001BF80CA7648_zpse0596627.jpg Here's the bottom of the barrel facing forward: http://img.photobucket.com/albums/v202/jberens/99CC1A88-E877-4995-AC4D-9DAFF8591C39-1074-000001BF93982679_zpsafd61504.jpg Here's the top of the barrel facing forward: http://img.photobucket.com/albums/v202/jberens/5934894A-4EF5-4574-9703-924590486DDB-1074-000001BF9E0F49D2_zps17ec9cf9.jpg |
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Quoted:
Thanks for the suggestion. Did exactly that and here's what I got: Used a T square with the bottom of the barrel sitting on the base of the T and the flange of the barrel touching the upright of the T http://img.photobucket.com/albums/v202/jberens/9804771D-19B2-4818-8119-9CE42A487CEE-1074-000001BF80CA7648_zpse0596627.jpg Here's the bottom of the barrel facing forward: http://img.photobucket.com/albums/v202/jberens/99CC1A88-E877-4995-AC4D-9DAFF8591C39-1074-000001BF93982679_zpsafd61504.jpg Here's the top of the barrel facing forward: http://img.photobucket.com/albums/v202/jberens/5934894A-4EF5-4574-9703-924590486DDB-1074-000001BF9E0F49D2_zps17ec9cf9.jpg How is the alignment prior to tightening the barrel nut? Also, is the extension collar resting flush against the face of the barrel socket? If not, then the channel for the index pin may have been cut too shallow, or the extension pin incorrectly located too far back, away from the collar. If this is the case, then the barrel is being pulled to one side as the nut is being torqued. |
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How is the alignment prior to tightening the barrel nut? Also, is the extension collar resting flush against the face of the barrel socket? If not, then the channel for the index pin may have been cut too shallow, or the extension pin incorrectly located too far back, away from the collar. If this is the case, then the barrel is being pulled to one side as the nut is being torqued. why does this matter if the barrel isn't straight to start with? |
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Quoted:
why does this matter if the barrel isn't straight to start with? Quoted:
How is the alignment prior to tightening the barrel nut? Also, is the extension collar resting flush against the face of the barrel socket? If not, then the channel for the index pin may have been cut too shallow, or the extension pin incorrectly located too far back, away from the collar. If this is the case, then the barrel is being pulled to one side as the nut is being torqued. why does this matter if the barrel isn't straight to start with? Lay the barrel on a flat surface and roll it. Is it bent? Is the extension offset? |
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Quoted:
why does this matter if the barrel isn't straight to start with? Quoted:
How is the alignment prior to tightening the barrel nut? Also, is the extension collar resting flush against the face of the barrel socket? If not, then the channel for the index pin may have been cut too shallow, or the extension pin incorrectly located too far back, away from the collar. If this is the case, then the barrel is being pulled to one side as the nut is being torqued. why does this matter if the barrel isn't straight to start with? It's the process of elimination. |
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Quoted:
I see your problem, it's ICE Arms. I have heard stories about their BCG's having issues in a group buy in another forum. The gas keys were not staked properly. Avoid ICE Arms!!! Those are harsh word considering you've *heard online* they had gas key staking issues. |
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