AR Sponsor
Posted: 2/27/2015 7:00:57 PM EDT
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Hello,
I am a newbie and built my first AR last week. I have a small issue that I am unsure about and would like some feedback or if this is normal... I finally got some ammo in, wanted to see if they cycle correctly so I chambered a round and pulled back on the charging handle. Unfortunately it was stuck! I was able to separate the upper and lower, but had to lightly pry the BCG back with a screwdriver until the charging handle loosened and cartridge came out. Also I smelled a little gunpowder but round was not fired *whew* I tried chambering different brand ammo and it cycled fine after pulling on the charging handle, but after inspecting the cartridge I noticed a small, shallow indentation on the primer. I also smelled a little bit of gunpowder just like the other ammo. What do you think? Is my firing pin suppose to move forward when I close the bolt causing the shallow indent but not firing? |
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Quoted:
Hello, I am a newbie and built my first AR last week. I have a small issue that I am unsure about and would like some feedback or if this is normal... I finally got some ammo in, wanted to see if they cycle correctly so I chambered a round and pulled back on the charging handle. Unfortunately it was stuck! I was able to separate the upper and lower, but had to lightly pry the BCG back with a screwdriver until the charging handle loosened and cartridge came out. Also I smelled a little gunpowder but round was not fired *whew* I tried chambering different brand ammo and it cycled fine after pulling on the charging handle, but after inspecting the cartridge I noticed a small, shallow indentation on the primer. I also smelled a little bit of gunpowder just like the other ammo. What do you think? Is my firing pin suppose to move forward when I close the bolt causing the shallow indent but not firing? That is normal. When you shake your bcg, you'll see the firing pin move forwards and back. |
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Hi.,
1. I don't think you should be doing any testing or function testing with live ammunition. 2 I think your sense of smell is off. The free floating firing pin will leave a dent in the primer upon chambering that's normal. Clean your chamber and add a light lube with CLP to your bolt carrier and bolt and charging handle and try it again this time with dummy rounds Snap-Caps. -W |
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Smell is anodizing against anodizing, and you are smelling such because you did not CLP lube the rifle's bearing parts correctly after cleaning it.
The FP is free floating in the bolt, but the FP can not protrude out of the bolt face until the bolt locks up (back of the carrrier blocks the FP from protruding out of the bolt face until the bolt is fully locked up). The FP only slightly dimples the primer on loading when the bolt finally locks up, and not taking a full running start at the primer on the initial impact of the bolt to barrel extension before the slows down and the bolt cams over. But even with this, muzzle control all all times encase you do get a Accidental discharge, and do not chamber the same live round over and over again into the rig. |
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