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Posted: 5/25/2020 3:18:45 PM EDT
[#1]
Check the gas tube hole in the upper. If it looks okay, then just replace the tube. Get the barrel tight again in the extension. That may need to go to a gunsmith.
As to your second question see this. Your experience proves what I said in the thread and that the first post didn’t nail it. |
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Posted: 5/25/2020 3:23:35 PM EDT
[#2]
Technically you should use barrel blocks.
How much torque were you applying? Your barrel extension probably wasn't torqued correctly anyways. I've had the same thing happen. If I had to do over I'd just reinstall the barrel to barrel extension with red loctite. I sent mine back to the manufacturer, who just sent back the same barrel supposedly retorqued. |
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Posted: 5/25/2020 3:46:59 PM EDT
[#3]
Did you break the barrel index pin?
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Posted: 5/25/2020 3:50:45 PM EDT
[#4]
Quote HistoryQuoted: Did you break the barrel index pin? I don't know. |
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Posted: 5/25/2020 3:51:08 PM EDT
[#5]
Quote HistoryQuoted: Did you break the barrel index pin? The only way he could have done this is if he spun the barrel loose from the extension. The RR interfaces with the extension, so torque applied during removal of a muzzle device wouldn’t have any effect on the index pin. OP it’s time to send the barrel back to the manufacturer. Who manufactured the barrel? As for appropriate tools, barrel blocks should be the choice if you think it’s going to require lots of torque to remove a muzzle device. RRs work well for the vast majority of muzzle device work without issue, but when torque gets high, what happened to you is an inherent risk. |
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Posted: 5/25/2020 4:01:27 PM EDT
[#6]
Quote HistoryQuoted: Technically you should use barrel blocks. How much torque were you applying? Your barrel extension probably wasn't torqued correctly anyways. I've had the same thing happen. If I had to do over I'd just reinstall the barrel to barrel extension with red loctite. I sent mine back to the manufacturer, who just sent back the same barrel supposedly retorqued. Unless you have the appropriate tools, you’re not getting the extension back to the appropriate torque spec, and if you can’t or it wasn’t torqued correctly in the first place, your gas port isn’t going to be aligned correctly and you risk affecting how the barrel headspaces. DIYing it with red Loctite seems like a poor idea. |
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Posted: 5/25/2020 4:44:13 PM EDT
[#7]
Thank you for your time and all of the info.
I'll send it in to ADCO and have them rebuild it. |
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Posted: 5/25/2020 4:44:44 PM EDT
[#8]
...and it was a
ETA: It was a BCM BFH Upper |
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Posted: 5/25/2020 4:49:37 PM EDT
[#9]
Quote HistoryQuoted: Thank you for your time and all of the info. I'll send it in to ADCO and have them rebuild it. May want to check with ADCO as I’m not sure they offer that service. @bigbore There’s also the chance the extension wasn’t torqued correctly in the first place (which admittedly would seem odd for DD). How much torque did you use when trying to remove the muzzle device? |
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Posted: 5/25/2020 4:51:34 PM EDT
[#10]
Quote HistoryQuoted: May want to check with ADCO as I’m not sure they offer that service. @bigbore There’s also the chance the extension wasn’t torqued correctly in the first place (which admittedly would seem odd for DD). How much torque did you use when trying to remove the muzzle device? I posted in ADCO's industry forum. I didn't use a torque wrench when attempting to remove the FH. |
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Posted: 5/25/2020 5:09:01 PM EDT
[#11]
Send the barrel back to DD. They will either fix it and maybe bill you, or discover it wasn’t torqued right. Shit happens. It would then need a new barrel since the gas port won’t be at 12 O’clock when properly torqued.
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Posted: 5/25/2020 5:18:11 PM EDT
[#12]
Barrel blocks for MD work.
Always OP, your bbl is fooked. |
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Posted: 5/25/2020 5:26:25 PM EDT
[#13]
Quote HistoryQuoted: I posted in ADCO's industry forum. I didn't use a torque wrench when attempting to remove the FH. Quote HistoryQuoted: Quoted: May want to check with ADCO as I’m not sure they offer that service. @bigbore There’s also the chance the extension wasn’t torqued correctly in the first place (which admittedly would seem odd for DD). How much torque did you use when trying to remove the muzzle device? I posted in ADCO's industry forum. I didn't use a torque wrench when attempting to remove the FH. Wasn’t asking for a specific torque measurement. Was just wondering if you had to muscle the shit out of it or if you were only applying a moderate/light amount of torque when it gave way. An answer to that could give you a better idea if the extension was torqued correctly in the first place. |
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Posted: 5/25/2020 5:29:16 PM EDT
[#14]
If your barrel spun and the receiver feed ramps still align with the barrel extension, your barrel is trash. If the barrel spun, and your extension turned in the receiver all you may need is a new index pin.
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Posted: 5/25/2020 5:31:47 PM EDT
[#15]
Quote HistoryQuoted: Wasn’t asking for a specific torque measurement. Was just wondering if you had to muscle the shit out of it or if you were only applying a moderate/light amount of torque when it gave way. An answer to that could give you a better idea if the extension was torqued correctly in the first place. I misunderstood. I wasn't muscling it too hard. I've used a plastic receiver clamp and used much more torque with no issues. |
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Posted: 5/25/2020 6:00:58 PM EDT
[#16]
Quote HistoryQuoted: If your barrel spun and the receiver feed ramps still align with the barrel extension, your barrel is trash. If the barrel spun, and your extension turned in the receiver all you may need is a new index pin. Looks like the barrel is trash. The feed ramps are still aligned with the extended feed ramps. Is the receiver still usable? |
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Posted: 5/25/2020 6:04:24 PM EDT
[#17]
The barrel spun in the extension? that's crazy. I've put some ridiculous torque on barrels and never spun it in the extension.
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Posted: 5/25/2020 6:12:32 PM EDT
[#18]
Quote HistoryQuoted: I misunderstood. I wasn't muscling it too hard. I've used a plastic receiver clamp and used much more torque with no issues. Quote HistoryQuoted: Quoted: Wasn’t asking for a specific torque measurement. Was just wondering if you had to muscle the shit out of it or if you were only applying a moderate/light amount of torque when it gave way. An answer to that could give you a better idea if the extension was torqued correctly in the first place. I misunderstood. I wasn't muscling it too hard. I've used a plastic receiver clamp and used much more torque with no issues. I’d be contacting DD and requesting a replacement. Extensions should be torqued to the barrel into the 150 ft lb range. You’d know if you got anywhere near that torque value trying to spin the muzzle device off. |
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Posted: 5/25/2020 6:15:54 PM EDT
[#19]
Quote HistoryQuoted: Looks like the barrel is trash. The feed ramps are still aligned with the extended feed ramps. Is the receiver still usable? Quote HistoryQuoted: Quoted: If your barrel spun and the receiver feed ramps still align with the barrel extension, your barrel is trash. If the barrel spun, and your extension turned in the receiver all you may need is a new index pin. Looks like the barrel is trash. The feed ramps are still aligned with the extended feed ramps. Is the receiver still usable? Receiver should be fine, using a RR, no torque should have been transmitted to the receiver. |
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Posted: 5/25/2020 6:35:19 PM EDT
[#20]
Thanks again all.
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Posted: 5/25/2020 8:02:50 PM EDT
[#21]
Quote HistoryQuoted: Looks like the barrel is trash. The feed ramps are still aligned with the extended feed ramps. Is the receiver still usable? If DD won't replace it, there's no way I'd trash the barrel over it. Its threaded. Take it apart and put it back together. That's what they're there for. Rockset or loctite, there's no rotational forces on the barrel to cause an issue. Alight the gas port assemble and shoot it. |
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Posted: 5/25/2020 9:21:21 PM EDT
[#22]
Quote HistoryQuoted: The only way he could have done this is if he spun the barrel loose from the extension. The RR interfaces with the extension, so torque applied during removal of a muzzle device wouldn’t have any effect on the index pin. OP it’s time to send the barrel back to the manufacturer. Who manufactured the barrel? As for appropriate tools, barrel blocks should be the choice if you think it’s going to require lots of torque to remove a muzzle device. RRs work well for the vast majority of muzzle device work without issue, but when torque gets high, what happened to you is an inherent risk. Turns out it was a BCM BFH Upper. I'll contact them tomorrow. |
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Posted: 5/26/2020 9:00:46 AM EDT
[#23]
Clamping a barrel tight enough to put the 150 ft pounds on the extension is difficult to do in a normal vise with barrel clamps. Had an early nitride barrel that loosened once. I had to put a .002" shim washer on it so it would get to 150 when extension aligned with the existing gas port. It was a pain in the butt to do and I never really used the barrel afterwards just wanted to see if I could do it.
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Posted: 5/27/2020 4:59:20 PM EDT
[#24]
Contacted BCM. They're going to take a look at it.
Hoping it can be resuscitated... |
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