AR Sponsor
Posted: 8/26/2012 2:34:49 PM EDT
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I finally finished my first AR build
I have 2 questions. 1. If i turn the front sight in the "up" direction does that raise the sight or my point of aim? 2. I cycled some rounds through just using the charging handle, without firing the gun, when i retrieved them off the floor the bullets had some scratches on the tips. Does this mean i need to polish my feedramps, and can this damage the barrel? |
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1. Sight corrections always "steer" the impact of the bullet. If it says 'UP', moving it in that direction moves the strike of the bullet up.
2. Could be from extraction also. I would say most people don't notice/care about any minor damage on chambering and probably don't look anyways. Polishing ramps is up to you but it could just be sharp corners on the locking lugs. |
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1) Turning the front sight post clockwise in the direction of the Up arrow raises your point of impact by lowering the front sight post.
2) Even if you are certain that the bullets picked up the marks by being chambered (they weren't pre-existing and they didn't get marred by falling on the floor), I still wouldn't worry about it or start messing with the feed ramps. Run a few hundred rounds through it. If you start having feeding problems, re-evaluate, but I wouldn't start "trouble-shooting" before shooting the thing. |
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Adjust as mentioned above. The scratches are normal. The rounds are fine.
Also, when you finally get around to shooting it... 1. The "sproing" sound from the stock is normal. 2. The blemishes / scratches on the brass deflector are normal. 3. Lube leaking out of the upper is normal...if it was properly lubed. 4. The irresistable urge to buy another is normal too. 
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Quoted:
Adjust as mentioned above. The scratches are normal. The rounds are fine. Also, when you finally get around to shooting it... 1. The "sproing" sound from the stock is normal. 2. The blemishes / scratches on the brass deflector are normal. 3. Lube leaking out of the upper is normal...if it was properly lubed. 4. The irresistable urge to buy another is normal too. I really happy to see these two are normal..I wondered about the "sproing" and my wife is gonna kill me when I tell her I already want another one. |
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Quoted:
I finally finished my first AR build I have 2 questions. 2. I cycled some rounds through just using the charging handle, without firing the gun, when i retrieved them off the floor the bullets had some scratches on the tips. Does this mean i need to polish my feedramps, and can this damage the barrel? The bolt cycles much faster in operation than it does when you manipulate it by hand. I doubt the rounds ever touch the feed ramps in actual operation. Don't worry about it. |
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Quoted:
1) Turning the front sight post clockwise in the direction of the Up arrow raises your point of impact by lowering the front sight post. 2) Even if you are certain that the bullets picked up the marks by being chambered (they weren't pre-existing and they didn't get marred by falling on the floor), I still wouldn't worry about it or start messing with the feed ramps. Run a few hundred rounds through it. If you start having feeding problems, re-evaluate, but I wouldn't start "trouble-shooting" before shooting the thing. This! |
The sproing! is your rifle's way of telling you that it is happy and operating correctly. Most of us have learned to love that sound 
As you get to know your new rifle, you will notice that it makes different sounds depending on what is happening. A full sproing! means that your weapon has completely cycled and is ready to fire the next round. A partial sproing! means that your bolt has locked back on an empty mag, and it's time to reload. Good luck with your new AR, and welcome to the sickness if this is your first 
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