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Posted: 3/26/2020 2:11:09 PM EDT
[#1]
If this is a duty gun, I'd absolutely replace it. I'd probably replace it either way.
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Posted: 3/26/2020 2:12:33 PM EDT
[#2]
If it is swollen/bulged for sure (me personally I would no matter what for peace of mind) but if not and it groups, I don't see what it would hurt?
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Posted: 3/26/2020 2:24:47 PM EDT
[#3]
If you end up not replacing it, I'd make sure this 'buddy' of yours is the one to take the first shot.
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Posted: 3/26/2020 2:28:44 PM EDT
[#4]
How did a .308" bullet make it halfway down a .224" hole and cause so little damage to the other parts you detailed?
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Posted: 3/26/2020 2:38:24 PM EDT
[#5]
Replace it.
Cost is minimal compared to what the liability cost is to the user, and to you as the qualified person. The components could be put back in service but I would not sign off on them unless I had 3rd party assurance that there wasn't unseen damage (barrel gauged and bore inspected; bolt and carrier magnafluxed or other otherwise tested, at a minimum). Visual inspection is not sufficient. Cheaper and easier to just replace the whole assembly. If there is a failure of some type involving that upper received group in the future, you do not want to be the one who put it back in service. Inspect and verify that the lower is still in factory specs and document that fact. Most likely there will be no issues as that is the low pressure part of the system but if it is ever questioned.... Saving the department or the shooter a few bucks is not worth the assumed liability. Just my opinion, Joat |
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Posted: 3/26/2020 2:40:10 PM EDT
[#6]
I'm a cheap bastard, and the only thing I would re-use from that upper is the handguards.
 No way in hell would I carry it into harms way. That bolt and barrel have been subjected to pressures far in excess of its design. Its all scrap metal at this point! |
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Posted: 3/26/2020 2:48:08 PM EDT
[#7]
Duty gun, I would replace and then put my boot up his ass again. Way to much liability involved in a kaboomed gun in a SHTF duty situation.
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Posted: 3/26/2020 3:09:02 PM EDT
[#8]
Thanks for the replies guys. I just happen to have two brand new M4 profile barrels in my armory. Off to order a new receiver and some parts.
Be safe out there. |
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Posted: 3/26/2020 4:17:25 PM EDT
[#9]
Quote HistoryQuoted: I'm a cheap bastard, and the only thing I would re-use from that upper is the handguards. No way in hell would I carry it into harms way. That bolt and barrel have been subjected to pressures far in excess of its design. Its all scrap metal at this point! Everything upper. Go over everything lower and then go over everything again. |
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Posted: 3/26/2020 5:29:48 PM EDT
[#10]
Put the cheapest barrel and receiver back on it and tell him he doesn't deserve nice things.
Sorry, not GD Check it thoroughly before returning it. |
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Posted: 3/26/2020 6:06:04 PM EDT
[#11]
In my professional opinion, get rid of the rifle and start with a new one.
The lives of your Officers and the people that you serve each day, may depend upon that rifle working 100% in all field conditions. If you rebuild it, it may work just fine and all is good to go. If you rebuild it and it fails, are you willing to assume the liability of a catastrophic failure where things blow up and someone gets injured, or worse where it fails to work in the field and an Officer or the public that we protect gets hurt or killed are you willing to be responsible? For the cost of a rifle, replace it. In the Armorer courses that we teach, we cover the problems of mistaking a 300 Blackout in a .223/5.56 barrel, and show numerous examples of it. In the Advanced Armorer courses that we teach, we show several examples of guns that have been blown up, had been involved in car accidents where things like a laptop computer struck it or the locking mount system had broken off sending the rifle flying, and a few rifles that had been dropped from high rise buildings, all were suspect of possible damage, but the agencies weren't sure if they were okay to use or rebuild or ditch them. In the Advanced Armorer course we show a few examples where the receivers and parts visually look to be okay. Then we gauge several of those same parts that visually look to be okay, and the gauging shows where things are bent, bowed, or sometimes stressed. We also show a few of the receivers, barrels, gas blocks/front sight bases, bolts, and bolt carriers that visually look okay, where we either have done a magentic particle inspection or dye test, which then shows where there are cracks and stress showing things that aren't normally observed by the human eye. CY6 Greg Sullivan "Sully" SLR15 Rifles TheDefensiveEdge.com (763) 712-0123 |
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Posted: 5/1/2020 1:29:10 AM EDT
[#12]
The bolt and barrel extension lugs are suspect in a over pressure incident, and without the equipment to confirm the condition, reusing the barrel assembly is taking on unwarranted risk to avoid the cost of a new barrel.
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