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Posted: 3/29/2017 12:30:45 PM EDT
I purchased a YHM Sidewinder to put on an HK USP Tactical .45. The suppressor is not even close to lining up and the first shot would blow it right off the barrel - it is obviously not lined up, so it has never been fired with the suppressor attached.
I thought the problem must be the $50 YHM piston, but closer inspection shows the factory threads on the HK are shit. They are not even close to being concentric to the bore. HK makes great products (most of the time). I wish they had an industry page on arfcom. Pics: 
April 12, 2017 UPDATE: I received an email this afternoon from HK with a tracking number for a new replacement barrel. The invoice stated "Inspected barrel. Found threads incorrectly timed to barrel. Replaced out of spec. barrel." I have no complaints about HK customer service now! I appreciate them making things right! |
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Posted: 3/29/2017 5:20:44 PM EDT
[#1]
Are you turning it the right (or left?) way?
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Posted: 3/29/2017 5:25:35 PM EDT
[#2]
The threads do look buggered up on one side.
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Posted: 3/29/2017 5:41:29 PM EDT
[#3]
What I would call cross threaded.
Hate to say it but that's an operator error. Was it tight turning it on the threads? |
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Posted: 3/29/2017 5:47:39 PM EDT
[#4]
Well the USP .45 Tac has a LH thread. I was wondering if he has the correct 16x1 thread pitch, but in the RH pattern. Would be shitty if so.
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Posted: 3/29/2017 6:02:45 PM EDT
[#5]
It's 16x1LH thread - I have the correct piston for it. I don't know how it would ever be cross threaded - you'd have to monkey it on there with a pipe wrench. The threads are much deeper on one side than the other, not equal at all.
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Posted: 3/29/2017 6:10:22 PM EDT
[#6]
Quote HistoryQuoted:
It's 16x1LH thread - I have the correct piston for it. I don't know how it would ever be cross threaded - you'd have to monkey it on there with a pipe wrench. The threads are much deeper on one side than the other, not equal at all. EDIT: Obviously HK should send you a new barrel, but HK gonna HK (probably). |
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Posted: 3/29/2017 6:20:20 PM EDT
[#7]
HK hates you.
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Posted: 3/29/2017 6:32:01 PM EDT
[#8]
Quote HistoryQuoted:
HK hates you. |
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Posted: 3/29/2017 6:54:59 PM EDT
[#9]
Quote HistoryQuoted:
What I would call cross threaded. Hate to say it but that's an operator error. Was it tight turning it on the threads? Either way it is now cross threaded. You can really see it in the last picture. Look at the ridges of the threads on left side of the last picture. See how they all look like they have 2 ridges. Something has cut down the the center of the original high point of the thread and caused it to have a valley in the center of the threads ridge. This is what happens in a cross thread. |
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Posted: 3/29/2017 8:43:56 PM EDT
[#10]
Go ask the guys at HKPro. They somehow manage to get pretty good support it seems....
ETA- bbl does look fucked. |
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Posted: 3/29/2017 8:57:31 PM EDT
[#11]
Quoted:
HK makes great products (most of the time), but their customer service sucks fucking balls. I have heard similar enough times it has to have some truth to it. Hope you end up getting satisfaction OP |
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Posted: 3/29/2017 9:03:11 PM EDT
[#12]
How about some more back story as to how you came across this HK Tactical. New? Used?
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Posted: 3/29/2017 9:05:35 PM EDT
[#13]
Threads appear to be cross-threaded. Not saying you did it OP, but that's what it looks like.
You said you had to wrench the adapter on. You check the threads before you started turning? |
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Posted: 3/29/2017 9:11:23 PM EDT
[#14]
Quote HistoryQuoted:
Threads appear to be cross-threaded. Not saying you did it OP, but that's what it looks like. You said you had to wrench the adapter on. You check the threads before you started turning? If it were cross threaded, wouldn't the other side of the threads be jacked up too? ETA: I did start the same thread on HKPro |
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Posted: 3/29/2017 10:28:56 PM EDT
[#15]
Quote HistoryQuoted:
That looks like a classic cross thread to me... Maybe OP did it, maybe he didnt and received it that way. Either way it is now cross threaded. You can really see it in the last picture. Look at the ridges of the threads on left side of the last picture. See how they all look like they have 2 ridges. Something has cut down the the center of the original high point of the thread and caused it to have a valley in the center of the threads ridge. This is what happens in a cross thread. |
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Posted: 3/29/2017 11:17:22 PM EDT
[#16]
Anyone who knows anything about threaded barrels knows that's a factory fuck up, or someone absolutely wrenched something onto the threads, using tools.
And I live in Illinois. Y'all should be ashamed of yourselves. |
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Posted: 3/29/2017 11:58:06 PM EDT
[#17]
That's unfortunate.
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Posted: 3/30/2017 12:05:14 PM EDT
[#18]
Took a picture of mine, just to make sure since I've never even shot it.
 Attached File |
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Posted: 3/30/2017 12:05:41 PM EDT
[#19]
D-P
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Posted: 3/30/2017 2:38:06 PM EDT
[#20]
That looks beautiful! Rugged Suppressor?
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Posted: 3/30/2017 7:31:31 PM EDT
[#21]
definitely a crossthread. I would just buy a new barrel from Jarvis or somebody and then have your factory one cut flush like a normal barrel. Your barrel threading could be saved but it wont look nice i.e. not factory, stick out like a sore thumb.
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Posted: 3/30/2017 10:35:39 PM EDT
[#22]
Quote HistoryQuoted:
This! Think you nailed it. Quote HistoryQuoted:
Quoted:
HK hates you. |
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Posted: 3/30/2017 10:49:30 PM EDT
[#23]
Love my MP5's and thank goodness I have spare parts for them......
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Posted: 3/31/2017 12:10:14 AM EDT
[#24]
Did you contact HK Customer service before you posted anything online? Some companies and custom gunsmiths have a policy that if you post about an issue online before contacting them and givng them a chance to fix it, they won't help you.
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Posted: 3/31/2017 12:28:11 AM EDT
[#25]
You guys who are saying he cross-threaded it have no idea what you are talking about. Look at the 2nd and 3rd pics. The threads on one side are twice the size of the threads on the other side. The threads are NOT concentric. Yes have may have buggered them a bit trying to screw the piston, but that's because the threads were so screwed to begin with, there is no way anything could possibly screw on there.
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Posted: 3/31/2017 12:46:18 AM EDT
[#26]
I would try and get a die for the 16x1 LH and correct it myself.
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Posted: 3/31/2017 12:49:08 AM EDT
[#27]
Quote HistoryQuoted:
Did you contact HK Customer service before you posted anything online? Some companies and custom gunsmiths have a policy that if you post about an issue online before contacting them and givng them a chance to fix it, they won't help you. |
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Posted: 3/31/2017 1:01:27 AM EDT
[#28]
Quote HistoryQuoted:
Which companies are those? Quote HistoryQuoted:
Quoted:
Did you contact HK Customer service before you posted anything online? Some companies and custom gunsmiths have a policy that if you post about an issue online before contacting them and givng them a chance to fix it, they won't help you. |
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Posted: 3/31/2017 1:03:05 AM EDT
[#29]
Quote HistoryQuoted:
Which companies are those? Quote HistoryQuoted:
Quoted:
Did you contact HK Customer service before you posted anything online? Some companies and custom gunsmiths have a policy that if you post about an issue online before contacting them and givng them a chance to fix it, they won't help you. |
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Posted: 3/31/2017 9:31:45 AM EDT
[#30]
Although it's been beat to death... yes, those are crossthreaded. The threads were machined correctly and then someone screwed something on incorrectly. They are concentric, just mashed down on one side because of something not being properly aligned when it was screwed on.
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Posted: 3/31/2017 12:35:07 PM EDT
[#31]
Some of you haven't a clue and others need to read before posting.
I have attempted to contact HK customer service numerous times via PBX and email. I have received NO RESPONSE. I wouldn't have posted here if they had contacted me. Try calling their customer service yourself - they do not answer the phone. I have left messages and they have not called back even though I requested a call back and left my number each time. All I wanted was for them to look at the barrel themselves. I never cross threaded the barrel. Let me say that again to be perfectly clear - I know how to thread a piston onto a barrel - if there is any force required at all, something is wrong. The piston from YHM is the correct size, it threads on easily, it just doesn't line up. In order to cross thread this barrel (or any barrel), there would have to be some brute strength involved. That did not happen. It appears it was cut wrong at the factory. IF it was cross threaded AFTER leaving the factory, how would the damaged threads still have the same black finish on all sides and not be shiny from being "cut" and damaged? 
The threads were damaged before the barrel was blued or melonited or whatever finish HK uses. I'm not going to mess with the threads on this barrel or try to fix them - a baffle strike is much more expensive than a replacement barrel. I would love to speak to HK, but they won't return my calls or emails. And if you have a list of companies that have a policy of not giving customer service after pictures are posted online, I would love to see it! I'll add them to the list of companies I won't buy from. |
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Posted: 3/31/2017 12:38:56 PM EDT
[#32]
One more:
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Posted: 3/31/2017 1:32:12 PM EDT
[#33]
A guy in a mud hut in Pakistan could have done a better threading job.
HK massively screwed the pooch here. That is frankly laughable quality control on HK's part. Laughably pathetic that is. OP: guns like this have the serial # on the frame, slide AND barrel. HK doesn't owe you a new barrel; they owe you a whole new gun! If HK wants to pawn-off a "mix-master" parts gun on some unsuspecting stooge - that's their business. You deserve a matching serial # gun with competently cut threads. Sad to see HK's quality is currently in the toilet. Not spending any of my money on garbage like that. |
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Posted: 3/31/2017 3:59:53 PM EDT
[#34]
That is a bad factory thread job... Those threads were cut like that. Even the shoulder looks wrong. Hard to tell in the pic. If that was a cross thread they would not be sharp, they would be rounded off or just messed up looking. Hopefully HK takes care of this, and I don't know if I would accept a new barrel. Unless they match the numbers to your gun. Hk's replacement barrels do not have numbers on them. I am really curious as to how Hk handles this. I have been called an HK fan boy by more than one person.
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Posted: 3/31/2017 5:27:22 PM EDT
[#35]
Are you indexing on the muzzle? If so, is your muzzle square and perpendicular to the bore?
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Posted: 3/31/2017 5:36:28 PM EDT
[#36]
Quote HistoryQuoted:
Are you indexing on the muzzle? If so, is your muzzle square and perpendicular to the bore? I don't know what you mean reference indexing on the muzzle - unless you mean the piston bottoming out on the barrel. The barrel is still crooked or not concentric to the bore when the piston is threaded on, but not bottomed out. |
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Posted: 3/31/2017 7:52:54 PM EDT
[#37]
Did the gun come with the factory thread protector?
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Posted: 3/31/2017 8:38:49 PM EDT
[#38]
Believe what you want, but the pictures in your original post, which were taken with much more light, suggest that the crossthread occurred after the barrel was finished.
No one is saying that YOU crossthreaded it, just that it happened at some point after being manufactured. Final inspection at HK? At the distributor? At the gun shop? Who knows. My bet would be somewhere in between. |
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Posted: 4/2/2017 9:05:21 AM EDT
[#39]
Quote HistoryQuoted:
It's 16x1LH thread - I have the correct piston for it. I don't know how it would ever be cross threaded - you'd have to monkey it on there with a pipe wrench. The threads are much deeper on one side than the other, not equal at all. 
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Posted: 4/2/2017 9:19:03 AM EDT
[#40]
Quote HistoryQuoted:
Did the gun come with the factory thread protector? |
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Posted: 4/2/2017 10:06:23 AM EDT
[#41]
It does look like the threads have the surface coating or finish on them still. The threads look crossthreaded because the barrel came loosing during machine threading. The barrel was partially threaded and then it was pushed off axis. The machine completed the threading process and cut the threads crossthreaded.
My machinist opinion anyway. |
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Posted: 4/2/2017 12:01:46 PM EDT
[#42]
Quote HistoryQuoted:
USP'S don't come with thread protectors. I know the .45 version doesn't for a fact chase I own one. |
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Posted: 4/4/2017 11:22:29 AM EDT
[#43]
Quote HistoryQuoted:
Believe what you want, but the pictures in your original post, which were taken with much more light, suggest that the crossthread occurred after the barrel was finished. No one is saying that YOU crossthreaded it, just that it happened at some point after being manufactured. Final inspection at HK? At the distributor? At the gun shop? Who knows. My bet would be somewhere in between. |
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Posted: 4/4/2017 12:30:34 PM EDT
[#44]
Quote HistoryQuoted:
It does look like the threads have the surface coating or finish on them still. The threads look crossthreaded because the barrel came loosing during machine threading. The barrel was partially threaded and then it was pushed off axis. The machine completed the threading process and cut the threads crossthreaded. My machinist opinion anyway. Coating is clearly still present, and it wasn't cross threaded with a nut. That would take some serious effort to accomplish, and it wouldn't look the same (clearly defined, not smashed). |
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Posted: 4/5/2017 7:25:29 PM EDT
[#45]
HK CS has replied to him on HK Pro.
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Posted: 4/5/2017 8:08:55 PM EDT
[#46]
Yep, I'll be in contact with HK tomorrow and am hopeful it will at least be looked at and eventually fixed. I'll update this thread when I know more.
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Posted: 4/5/2017 8:39:30 PM EDT
[#47]
You should get a new barrel at the very lesst. Crossin fingers.
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Posted: 4/5/2017 11:58:39 PM EDT
[#48]
Quote HistoryQuoted:
Denial is strong with this one, or just dumb. I'm having a hard time accepting that the machine operator could screw up the threads that bad and not notice, that the finisher could not notice, and thay the assembler could not notice. From ANY company. However, after looking closer and seeing the chip in the threads it does seem to be a tooling/machine problem. 
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Posted: 4/6/2017 10:44:04 AM EDT
[#49]
I called and spoke with HK CS - they gave me an RMA # and will be looking at the barrel themselves. Apparently, I had selected the wrong options when I called before and left messages in the wrong area of HK.
The CS Rep was very helpful. |
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Posted: 4/6/2017 7:22:01 PM EDT
[#50]
Good to hear. HK CS has gotten better for the last decade. They have treated me fine.
People still perpetuate their (HK) past CS experiences. |
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