PTR 9CT -PTR 601 /SB brace problem - Page 3
Page 3 of 4 FirstFirst 1 2 3 4 LastLast
Results 21 to 30 of 38
Like Tree1Likes

Thread: PTR 9CT -PTR 601 /SB brace problem

  1. #21
    Junior Member

    Join Date : Mar 2019
    Posts : 13
    Mentioned
    0 Post(s)

    Default

    Quote Originally Posted by Area52 View Post
    I have a problem with my PTR 9CT -PTR 601. It came with a SB Brace along with the end cap. I installed the SB brace and just like others posted, it was a chore getting the push pin to line up. However that is not my main problem. The problem Iím reporting is when I took it to the range I was able to fire one round before the bolt group went way back to the rear of the gun and stayed there. It came forward when I removed the back push pin. I tried it again same result. I tried firing it with the end cap instead of the brace and it appeared to work fine.

    I took it to a gun shop where they replaced the spacer on the inside of the SB brace with a different size. I took it to the range to test it and found that with 115 gr ammo it work fine. I went to 124gr and the problem occurred again but this time not as extreme. I was able to get the bolt freed and come forward by just hitting the side of the gun with the palm of by hand. However I went back to 115 Gr and then back to 124 gr this time both types of ammo fired without incident. I also fired 147 GR without the problem occurring .

    I cleaned and oiled the gun and took it to the range again and the same thing happened, 115 gr worked fine, 124 gr bolt frozen to the rear, back to 115 gr then 124 gr again and it appeared to work fine.

    I was only using commercial loaded ammunition namely Federal and American Eagle, the gun was well lubricated and these events occurred with multiple magazines.

    It appears that the gun doesn't like the SB brace.
    My question is; does anyone else have this issue if so what is the remedy?
    Quote Originally Posted by Papaya808 View Post
    Im having the exact same problem as you when I install my brace. The gun fires just fine when the push pin is completely removed, but when it is installed the bolt locks on every shot. Did you alleviate your issue?
    Quote Originally Posted by islandfocus2 View Post
    My LGS had a customer who also has a 9CT with the same problem. The problem is the SB brace. I believe the customer got in contact with SB Tactical. They sent him a new SB brace and it worked fine after.
    It appears I got the problem remedied. The gun shop I took it to contacted PTR who recommended redrilling/widening the hole on the SB brace. They did that and the malfunction mentioned in the original posts has ceased. The push pin also is a lot easier to install and remove. I tried a variety of ammo it work flawlessly.

    So it appears if anyone else is having this problem the two options are contact SB brace tactical and get replacement brace as mentioned above by islandfocus2. Or the second option is contact PTR as ask what the recommended size of the drill bit is needed to alleviate the problem. It might be easier contacting SB brace. I also heard they have updated their SB brace for this firearm so that might alleviate the problem altogether.
    robyee likes this.

  2. #22
    HKPRO Professional
    GTS197's Avatar
    Join Date : Apr 2007
    Location : TX
    Posts : 337
    Mentioned
    2 Post(s)

    Default

    Just found this thread.

    I had the exact same thing happen with mine. I ended up swapping the blue buffer from the brace with the black one from the factory end-cap, which is considerably thicker. The bolts are different, so I countersunk the thicker factory buffer so the shorter bolt would drop in and engage the threads in the brace adapter. It was a home remedy, but I haven’t had any stoppages since I did it.
    If you can't be safe...be deadly.

  3. #23
    Junior Member

    Join Date : Sep 2011
    Posts : 16
    Mentioned
    0 Post(s)

    Default

    Hmm...now I'm thinking and that's never a good thing! I have a brand new PTR, from Atlantic. The SB brace slides on/off much easier than the factory cap, but that last 1/4" is still a chore. However, the issue I'm having is that it's touching the corners of the "lower", before the pin hole lines up entirely. I'm no thinking I'll widen the hole in the brace to solve that issue and prevent the OP's issue.
    "Honey, when I die, sell my guns for what they're worth and not what I told you I paid for them."

  4. Remove Advertisements
    HKPro.com
    Advertisements

  5. #24
    Junior Member

    Join Date : Nov 2018
    Posts : 37
    Mentioned
    0 Post(s)

    Default

    Quote Originally Posted by Area52 View Post
    I have a problem with my PTR 9CT -PTR 601. It came with a SB Brace along with the end cap. I installed the SB brace and just like others posted, it was a chore getting the push pin to line up. However that is not my main problem. The problem Iím reporting is when I took it to the range I was able to fire one round before the bolt group went way back to the rear of the gun and stayed there. It came forward when I removed the back push pin. I tried it again same result. I tried firing it with the end cap instead of the brace and it appeared to work fine.

    I took it to a gun shop where they replaced the spacer on the inside of the SB brace with a different size. I took it to the range to test it and found that with 115 gr ammo it work fine. I went to 124gr and the problem occurred again but this time not as extreme. I was able to get the bolt freed and come forward by just hitting the side of the gun with the palm of by hand. However I went back to 115 Gr and then back to 124 gr this time both types of ammo fired without incident. I also fired 147 GR without the problem occurring .

    I cleaned and oiled the gun and took it to the range again and the same thing happened, 115 gr worked fine, 124 gr bolt frozen to the rear, back to 115 gr then 124 gr again and it appeared to work fine.

    I was only using commercial loaded ammunition namely Federal and American Eagle, the gun was well lubricated and these events occurred with multiple magazines.

    It appears that the gun doesn't like the SB brace.
    My question is; does anyone else have this issue if so what is the remedy?
    I've had mine for almost a year and the brace fits perfect. Never had a problem with the gun and it runs like a top. It sounds like a quality control issue with the brace not PTR. You can always try this and it fits like a glove but if you leave it on then it's an SBR unless you have a sear.
    https://www.gunpartscorp.com/products/1573180

  6. #25
    Junior Member

    Join Date : Nov 2018
    Posts : 37
    Mentioned
    0 Post(s)

    Default

    Quote Originally Posted by penguin4 View Post
    I am curious as to what ptr says about the 80 degree locking piece as well. I too have the hk parts and rcm and they donít fit. I would really like to run 147s suppressed without having to replace the bolt head.
    Interesting from some of the quotes. Mine came with a 100 degree locking piece and from my limited knowledge is correct for an MP5. It also came with the brace which fits perfectly with no mod. I changed the handguard to an original HK MP5 handguard, original HK SEF pack and switch off between the HK A3 stock. Hard to tell the difference from an MP5. https://www.gunpartscorp.com/products/1573180 I like the SB brace better. I never have had any issues and use all sorts of ammo including reloads and switch between shooting with and without a silencer. No issues and a couple others I know that have them have not had any issues either??? Over a 1000 rounds mostly on F/A it shows very little wear. I would send the gun back to PTR if issues arise as they stand behind their products not a gunsmith. No disrespect but it's free.

  7. #26
    Member
    Gilly19's Avatar
    Join Date : Apr 2017
    Location : Heart of Dixie
    Age : 52
    Posts : 93
    Mentioned
    1 Post(s)

    Default

    I resurrecting this thread (from last month) because I've been trying to mate the SB HKPDW to my new SP5, and I have the same problem as mentioned above. It will get to within 1/8th or 1/16th of an inch for the pin to go through, but I just can't get there. After reading the posts above, I'm now debating whether to return the brace or widen the holes on the brace.

  8. #27
    Junior Member

    Join Date : Dec 2016
    Location : Indianapolis, Indiana
    Posts : 21
    Mentioned
    0 Post(s)

    Default

    Hi recently got a PTR 9CT along with a SBT5A folding brace from Grab a Gun. The brace doesn't want to fit flush since it isn't cut properly and makes contact
    on the corners of the trigger housing which prevents the brace from fitting properly. Now the brace/encap on the SB website looks like it is cut properly and
    shows more like a 90 degree angle rather than my brace which has a rounded corner which hits the pointed tip of the trigger housing/lower. Not sure if the
    Brace from Grab a Gun was an old design or old stock and if SB has updated their design in order to fit better. Since it's been over 30 days since I bought
    the gun and the brace I doubt that Grab a Gun will take the brace back. I will contact SB and see if they are willing to assist. PTR 9CT -PTR 601 /SB brace problem-inkedbrace3_li.jpg

  9. #28
    Junior Member

    Join Date : Aug 2006
    Posts : 7
    Mentioned
    0 Post(s)

    Default

    Quote Originally Posted by thomassmith View Post
    Hi recently got a PTR 9CT along with a SBT5A folding brace from Grab a Gun. The brace doesn't want to fit flush since it isn't cut properly and makes contact
    on the corners of the trigger housing which prevents the brace from fitting properly. Now the brace/encap on the SB website looks like it is cut properly and
    shows more like a 90 degree angle rather than my brace which has a rounded corner which hits the pointed tip of the trigger housing/lower. Not sure if the
    Brace from Grab a Gun was an old design or old stock and if SB has updated their design in order to fit better. Since it's been over 30 days since I bought
    the gun and the brace I doubt that Grab a Gun will take the brace back. I will contact SB and see if they are willing to assist. Click image for larger version.†

Name:	InkedBrace3_LI.jpg†
Views:	86†
Size:	3.10 MB†
ID:	255672
    My LGS ordered my brace from SB directly and it looked similar to that. This was maybe 2 months ago. I had a horrible time getting mine on. I had to use a file to take some material off because it was hitting in the same spot. Then once I was able to slide the brace in, the holes didn’t line up with one being slightly lower than the gun holes. So again I had to take the file to it. I took just a bit too much material and now my lower receiver moves a really small amount. It’s not annoying or affected the operation so I’ve just left as is.

  10. #29
    Junior Member

    Join Date : Dec 2016
    Location : Indianapolis, Indiana
    Posts : 21
    Mentioned
    0 Post(s)

    Default

    Quote Originally Posted by JJIV View Post
    My LGS ordered my brace from SB directly and it looked similar to that. This was maybe 2 months ago. I had a horrible time getting mine on. I had to use a file to take some material off because it was hitting in the same spot. Then once I was able to slide the brace in, the holes didnít line up with one being slightly lower than the gun holes. So again I had to take the file to it. I took just a bit too much material and now my lower receiver moves a really small amount. Itís not annoying or affected the operation so Iíve just left as is.
    I hate to take a file or dremel to a brand new brace just to mess things up even worse. I will contact SB to see if they can send me a different end cap. Perhaps they improved the design or perhaps they made it worse since i also got mine about 2 months ago but with all that is going on in the world I never did take it to the range yet.

  11. #30
    Junior Member

    Join Date : Aug 2006
    Posts : 7
    Mentioned
    0 Post(s)

    Default

    Quote Originally Posted by thomassmith View Post
    I hate to take a file or dremel to a brand new brace just to mess things up even worse. I will contact SB to see if they can send me a different end cap. Perhaps they improved the design or perhaps they made it worse since i also got mine about 2 months ago but with all that is going on in the world I never did take it to the range yet.
    I hear ya. I read quite a few threads that talked about fitment issues with the SB brace and the mp5 clones, so I just took the file to it. I’ve been able to run it at the range without any issues. I’m curious to hear what they say when you speak to them.

Page 3 of 4 FirstFirst 1 2 3 4 LastLast

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts

Search tags for this page

brace for ptr 9ct

,

how to install the sbt5a stock on ptr ct 601

,

installing sb tactical brace on ptr 9ct

,

ptr 601 brace

,

ptr 601 forum

,

ptr 9ct

,

ptr 9ct changing bolt

,

ptr 9ct locking piece

,

ptr 9ct review

,

ptr 9ct review forum

,

sbt5a ptr

,

what sb brace goes with ptr 601 ct

Click on a term to search for related topics.