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Posted: 7/12/2022 11:16:44 PM EDT
[#1]
If there’s no visible damage and the bolt cycles easily without ammo, it is fine.
Blast away. |
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Posted: 7/12/2022 11:17:19 PM EDT
[#2]
Inspect it thoroughly. I doubt you’ll have any issues though.
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Posted: 7/12/2022 11:21:22 PM EDT
[#3]
The main risk to damage is dropping it on the gas key.
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Posted: 7/13/2022 12:26:06 AM EDT
[#4]
Quote HistoryQuoted: The main risk to damage is dropping it on the gas key. I dropped the bolt itself, out of the carrier. I'm going to inspect it again and try it. I was surprised when I picked it up and didn't find an obround tail., it landed pretty hard. The thing I'm worried most about is fracturing that I may not see causing a catastrophic failure. |
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Posted: 7/13/2022 1:18:51 AM EDT
[#5]
Honestly , if you’re that worried, $75 for a new bolt and you’re ability to sleep at night, just buy a new one.
But I highly doubt you’re gonna have a problem. When I was a little younger, I was so anal about everything , that I would lose sleep over shit like this too. I’ve since realized that it’s not worth losing sleep over physical things and have learned to let it go. Either shoot the thing or buy a new one and be done with it. My kids keep me up at night enough as it is lol. Just my two cents. |
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Posted: 7/13/2022 2:08:54 AM EDT
[#6]
Chances are it’s fine, but it is a relative short lived part anyway: I would buy a spare/backup anyway.
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Posted: 7/13/2022 8:35:33 AM EDT
[#7]
It slams into a steel barrel extension at least once every shot.
A drop on cement oughta be ok.. |
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Posted: 7/13/2022 4:25:17 PM EDT
[#8]
Probably the only damage was to the concrete...
 That's OK, doubt the grain of salt size chip will cause your floor to fail. |
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Posted: 7/13/2022 7:31:56 PM EDT
[#9]
Lighted magnifier
People say just to look at it for damage. Ok. With a naked eye? Not so much. What you need, if you don't already have one, is a lighted magnifier of some sort. In context, clean this bolt to bare metal. (Probably brings up another thread.) Then with good light and at least 2x magnification, examine it. My guess is you won't find any damage. But I will give you two ideas. First, put that thing in a nice box and give it to your brother in law at Christmas. Second, buy yourself a new complete bolt and new cam pin. Designate the dropped bolt as a spare. |
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Posted: 7/14/2022 6:32:22 AM EDT
[#10]
I wouldn't worry. I think I've abused a bolt, carrier, and rifle in about every way imaginable and damage that makes them unsafe is usually pretty obvious. If it looks fine, clean it up and run it. If every Army private that ever dropped a bolt replaced it we'd have a national debt that Brandon would be embarrassed by.
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Posted: 7/14/2022 6:38:16 AM EDT
[#11]
I'll bet 75% of the M16/M4s in the Army's inventory have had a bolt or carrier hit the floor at some point.
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Posted: 7/14/2022 4:30:42 PM EDT
[#12]
The bolt undergoes worse during firing.
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Posted: 7/14/2022 4:31:13 PM EDT
[#13]
Quote HistoryQuoted: I'll bet 75% of the M16/M4s in the Army's inventory have had a bolt or carrier hit the floor at some point. I have seen some gas keys mangled on the ones that landed wrong. |
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Posted: 7/14/2022 10:27:27 PM EDT
[#14]
HPT/MPI.
And now EDT. (Elevated drop test). 
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Posted: 7/18/2022 3:09:17 AM EDT
[#15]
Just an update for anyone in the future searching this. I have run about 100 rounds through the bolt since dropping it. I have seen no change in the function of the rifle (still works great). I plan on inspecting it in the next few days when I get a chance to clean it again.
Thanks for the help everyone |
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Posted: 7/18/2022 5:24:54 PM EDT
[#16]
Quote HistoryQuoted: It slams into a steel barrel extension at least once every shot. A drop on cement oughta be ok.. This is where I'm at. Always good to have a space Bolt/BCG |
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Posted: 7/18/2022 6:42:52 PM EDT
[#17]
Quote History@xciapup Thanks for the link, blew3 another $20 for a tool/toy  Have only tried it out with one set of lenses so far, but seems to do the job. |
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Posted: 7/29/2022 7:06:11 PM EDT
[#18]
Quote HistoryQuoted: I'll bet 75% of the M16/M4s in the Army's inventory have had a bolt or carrier hit the floor at some point. Fact. Same goes for the Air Force as well. If DOD pulled every bolt or bolt carrier out of service because it was dropped on concrete they'd go through a lot of them. It is fine. |
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Posted: 8/3/2022 6:32:44 PM EDT
[#19]
Have you ever seen what a private can do to equipment? Your bolt is US Army approved to handle Pvt Pyle, so I think 1 drop at 4ft is fine.
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Posted: 8/3/2022 6:38:38 PM EDT
[#20]
Quote HistoryQuoted: Chances are it’s fine, but it is a relative short lived part anyway: I would buy a spare/backup anyway. You consider 7-15k rounds short lived? I guess I don't consider running $3,500-$7,500 worth of ammo as being a small amount. Edit: I've only killed one gun by dropping a bolt on concrete. Was a ruger 10/22. Ar bolts are tough though. I'd run it if I saw no damage. |
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Posted: 8/5/2022 4:49:10 PM EDT
[#21]
Quote HistoryQuoted: The bolt undergoes worse during firing. This Function test & start practicing. |
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Posted: 8/15/2022 7:47:17 AM EDT
[#22]
Slams against steel every time you squeeze the trigger. Your almost certainly GTG (Good to Go). Don't over think it.
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Posted: 9/27/2022 11:36:31 PM EDT
[#23]
You are way over thinking it. Those bolts are tough. They get slammed hard over and over and keep on ticking. They take 60,000 PSI metal on metal. A 4 foot drop on soft concrete is nothing.
If you dropped the entire bolt carrier group and it landed on the gas key tube it could bend the tube but just the bolt just keep shooting it forget about don't go OCD on it. |
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Posted: 10/4/2022 5:32:31 PM EDT
[#24]
Hey OP as everyone has already stated it's fine and you are probably over thinking it. The pressures of dropping from 4 feet are in no way similar to the pressures during normal operation. Test fire and blast on.
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