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Old 11-07-2019, 01:56 PM   #1
TXBowhunter11
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Anyone ever a little worried to shoot an ar after a build? I converted my 556 ar to a 6.5 Grendel. Just a wee bit hesitant... whats the worst that can happen?
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Old 11-07-2019, 02:05 PM   #2
Jon B
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Catastrophic failure and plastic surgery! I felt that way with the first upper I built. Did you replace with a complete upper or did you change out just the barrel ?
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Old 11-07-2019, 02:09 PM   #3
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Catastrophic failure and plastic surgery! I felt that way with the first upper I built. Did you replace with a complete upper or did you change out just the barrel ?
changed bolt carrier, barrell. those are the two main things. then I did a lot of little things here and there, pivot pins, charging handle, forward assist, ect. but the main thing I did I'm concerned about his changing out barrel, gas block & line, and bolt carrier.
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Old 11-07-2019, 02:16 PM   #4
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changed bolt carrier, barrell. those are the two main things. then I did a lot of little things here and there, pivot pins, charging handle, forward assist, ect. but the main thing I did I'm concerned about his changing out barrel, gas block & line, and bolt carrier.
I am by no means a gunsmith nor am I going to pay out if it blows up on you but you can't really alter the head space on an AR-15 without a chamber reamer or putting some kind of washer between the barrel and upper receiver. That [Excessive Headspace] would be my only concern. If the chamber is too tight it will not go into battery. I think you are good.

Heck with all the parts kit guns that have been thrown together in the last few years a lot of kitchen table gunsmiths would be missing fingers and eyes if it was easy to mess it up. Google blown up AR-15 if you want to scare your self.
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Old 11-07-2019, 02:26 PM   #5
LMiz
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If you are scared just hold it as far away from you as possible
Or hide behind a tree or side of a building
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Old 11-07-2019, 02:33 PM   #6
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Or rig up some type of vise and pull the string.
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Old 11-07-2019, 02:35 PM   #7
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Duct tape it to a bench and tie a string to the trigger. While someone hold's your beer, pull the string. Please video and share.
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Old 11-07-2019, 02:37 PM   #8
6.5CM
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I was the same way when I built my AR I literally held it away from my face and pulled the trigger once I knew it was safe game on.
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Old 11-07-2019, 02:42 PM   #9
Spoiled_TN_boy
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Nope. I just machined off 426g from my bull barrel to lighten up our grendel.
We had no need for a huge diameter barrel.

Took 2 bucks last Sat morning 30 minutes apart from same stand.
#1 @ 97.5 yards
#2 @ 106.2 yards
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Old 11-07-2019, 02:43 PM   #10
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Just send it to me to test. If it blows up I'll just keep it and won't sue you.
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Old 11-07-2019, 02:47 PM   #11
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Old 11-07-2019, 02:51 PM   #12
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Old 11-07-2019, 03:47 PM   #13
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Quote:
Originally Posted by Spoiled_TN_boy View Post
Nope. I just machined off 426g from my bull barrel to lighten up our grendel.
We had no need for a huge diameter barrel.

Took 2 bucks last Sat morning 30 minutes apart from same stand.
#1 @ 97.5 yards
#2 @ 106.2 yards
The second deer shot was 7.9 meters or 312.9 inches further. What was the difference in bullet drop between the second and first shot?
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Old 11-07-2019, 05:27 PM   #14
DesertDug
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check head space with go no/go gauges.
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Old 11-07-2019, 07:28 PM   #15
texan4ut
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I felt the same way after I built my 1st AR. My mom lives in the country so I went to her place to test fire it and sight it in. Told to have 911 on speed dial.
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Old 11-07-2019, 07:53 PM   #16
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I was a little like that when I built my grendel. I was going to get some gauges but just went ahead and shot it. You should be good, when I was doing research I read that the biggest concern was parts from nonreputable companies.
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Old 11-07-2019, 09:51 PM   #17
Mike D
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Quote:
Originally Posted by Jon B View Post
I am by no means a gunsmith nor am I going to pay out if it blows up on you but you can't really alter the head space on an AR-15 without a chamber reamer or putting some kind of washer between the barrel and upper receiver. That [Excessive Headspace] would be my only concern. If the chamber is too tight it will not go into battery. I think you are good.



Heck with all the parts kit guns that have been thrown together in the last few years a lot of kitchen table gunsmiths would be missing fingers and eyes if it was easy to mess it up. Google blown up AR-15 if you want to scare your self.


No doubt. If places like PSA, runner runner guns, radical firearms and other budget places can throw together a rifle and it not blow your face off, you will be fine.


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Old 11-07-2019, 10:30 PM   #18
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Quote:
Originally Posted by Jon B View Post
I am by no means a gunsmith nor am I going to pay out if it blows up on you but you can't really alter the head space on an AR-15 without a chamber reamer or putting some kind of washer between the barrel and upper receiver. That [Excessive Headspace] would be my only concern. If the chamber is too tight it will not go into battery. I think you are good.

Heck with all the parts kit guns that have been thrown together in the last few years a lot of kitchen table gunsmiths would be missing fingers and eyes if it was easy to mess it up. Google blown up AR-15 if you want to scare your self.
The head spacing on a AR 15 or AR 10, is preset when the barrel company installs the barrel extension on the barrel. There is a possibility of a head spacing variation because of a bolt that is not machined to spec.
This is the reason, that so many people build AR 15s and AR 10s, because of the design of the barrels, head spacing is mostly factored out.
So most anyone can put a AR together.
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Old 11-07-2019, 10:31 PM   #19
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Originally Posted by walker View Post
just send it to me to test. If it blows up i'll just keep it and won't sue you.
ha! Ha! Ha! Ha!
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Old 11-07-2019, 10:34 PM   #20
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Originally Posted by TXBowhunter11 View Post
Anyone ever a little worried to shoot an ar after a build? I converted my 556 ar to a 6.5 Grendel. Just a wee bit hesitant... whats the worst that can happen?
Don't worry about it, just take it out and shoot. The most likely problem is over gassing, causing the empty cases to not be ejected correctly. Even then, many people don't know if their gun is over gassing or under gassing, unless it is undergassed to the point it does not fully eject the cases.
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Old 11-07-2019, 10:58 PM   #21
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A buddy of mine had a .22 marlin that he had shoved in between his porch and trailer roof that was rusted and clogged with mud so back I didnít ever think it would work. Took it home and broke a cleaning rod and several brushes getting the barrel unclogged. Also used a can of WD to get the trigger working again and the safety and when it came time to fire it I put on some welding gloves and held it around the side of my parents brick house to pull the trigger.


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Old 11-07-2019, 11:04 PM   #22
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Nah. Plug and play system. Swap and strip parts. That's how they were designed.

Gary
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Old 11-07-2019, 11:14 PM   #23
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Lego sets for grown men. I was scared to death the first one I built. Now, I just shoot them with factory ammo for function test and then let them eat.
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Old 11-07-2019, 11:19 PM   #24
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Nope.

Only thing I worry about is a gas block being misaligned and me having to fix it.
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Old 11-07-2019, 11:39 PM   #25
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Quote:
Originally Posted by sendit View Post
The second deer shot was 7.9 meters or 312.9 inches further. What was the difference in bullet drop between the second and first shot?

11 year old boy 1st shot 4 inches right and low
Gut shot but Hornady SST did there job. 40 yard track.

36 year old dad 2nd shot honey hole
Took out both lungs, buck dropped in it's tracks

At the range 2 days prior:
63.5mm diameter circle at 50 meters
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