PTR 9CT Lower Questions
Results 1 to 9 of 9
Like Tree1Likes
  • 1 Post By chopperbobby

Thread: PTR 9CT Lower Questions

  1. #1
    Junior Member
    PTR_9CT_Soldat's Avatar
    Join Date : Apr 2020
    Location : Idaho
    Posts : 29
    Mentioned
    0 Post(s)

    Default PTR 9CT Lower Questions

    Hi All,

    Received my new PTR 9CT and ordered a SEF Navy "Style" lower online.
    Online company stated that it will fit, but "slight" modifications might be required to make it fit - mainly the ears of the SEF lower.

    So, here are the pictures and feedback thus far (hopefully some smiths are visiting this forum - so please chime in - greatly appreciated):

    Picture 1)
    The left lower is the SEF Navy "Style" lower, the right one is the OEM lower that came with the PTR.

    Question 1: - For those of you that switched to the SEF Navy stye lower, did you have to dremel to bar (on the bottom of the lower) - right below the triger cutout.
    You can see there is no bar in the OEM, only the left and right tab to hold the trigger housing.

    I had to dremel/file the ears down to the same width as on the OEM lower from PTR.

    What did you have to do to make it work?

    PTR 9CT Lower Questions-img_5557.jpg

    Picture 2)
    Attachment 258490

    Attachment 258496

    The SEF Navy "Style" lower is on the right upside down, the PTR OEM lower is on the left in Picture 2.
    Now it gets interesting. The OEM has a straight line across the front of the lower (where the ears are).
    Now take a look at the SEF Navy "style" lower. It starts straight across - but only half of the way. Then, it drops down the other half of the way.

    Questions 2: - Why is that? And what purpose does it serve?
    Questions 3: - Does it impact performance/function of the ejector?

    PTR 9CT Lower Questions-img_5561-2-.jpg

    I also had to enlarge the opening for the shelf. It fits very snug.
    Here is a picture of it on the PTR.
    PTR 9CT Lower Questions-img_5435.jpg

    What did you have to do to make it work?

    Thank you for your comments, tips, advise (especially from the smithies) and anyone else that has swapped the lower, using the same OEM trigger pack!

    PTR_9CT_Soldat
    Last edited by PTR_9CT_Soldat; 04-28-2020 at 04:28 AM.

  2. #2
    Unrepentant HKHolic
    HK556WI's Avatar
    Join Date : Jul 2010
    Location : WI
    Posts : 2,180
    Mentioned
    13 Post(s)

    Default

    Quote Originally Posted by PTR_9CT_Soldat View Post
    Hi All,

    Received my new PTR 9CT and ordered a SEF Navy "Style" lower online.
    Online company stated that it will fit, but "slight" modifications might be required to make it fit - mainly the ears of the SEF lower.

    So, here are the pictures and feedback thus far (hopefully some smiths are visiting this forum - so please chime in - greatly appreciated):

    Picture 1)
    The left lower is the SEF Navy "Style" lower, the right one is the OEM lower that came with the PTR.

    Question 1: - For those of you that switched to the SEF Navy stye lower, did you have to dremel to bar (on the bottom of the lower) - right below the triger cutout.
    You can see there is no bar in the OEM, only the left and right tab to hold the trigger housing.

    I had to dremel/file the ears down to the same width as on the OEM lower from PTR.

    What did you have to do to make it work?

    Click image for larger version. 

Name:	IMG_5557.jpg 
Views:	90 
Size:	572.5 KB 
ID:	258486

    Picture 2)
    Attachment 258490

    Attachment 258496

    The SEF Navy "Style" lower is on the right upside down, the PTR OEM lower is on the left in Picture 2.
    Now it gets interesting. The OEM has a straight line across the front of the lower (where the ears are).
    Now take a look at the SEF Navy "style" lower. It starts straight across - but only half of the way. Then, it drops down the other half of the way.

    Questions 2: - Why is that? And what purpose does it serve?
    Questions 3: - Does it impact performance/function of the ejector?

    Click image for larger version. 

Name:	IMG_5561 (2).jpg 
Views:	84 
Size:	255.6 KB 
ID:	258494

    I also had to enlarge the opening for the shelf. It fits very snug.
    Here is a picture of it on the PTR.
    Click image for larger version. 

Name:	IMG_5435.jpg 
Views:	109 
Size:	894.6 KB 
ID:	258492

    What did you have to do to make it work?

    Thank you for your comments, tips, advise (especially from the smithies) and anyone else that has swapped the lower, using the same OEM trigger pack!

    PTR_9CT_Soldat

    It is called Clipped and Pinned.

    Look at all the pictures and read the description. It gives a complete explanation.

    https://www.robertrtg.com/store/pc/C...EW-40p2118.htm
    Lighting the Darkness

  3. #3
    Junior Member
    PTR_9CT_Soldat's Avatar
    Join Date : Apr 2020
    Location : Idaho
    Posts : 29
    Mentioned
    0 Post(s)

    Default

    Hi HK556WI,
    The pictures I posted are:
    1) OEM lower from my PTR 9CT (MP5 Clone)
    2) SEF Navy “Style” Clipped and Pinned Lower purchased from HK Parts.

    Your link shows pictures for a G3 PTR rifle, there are only pictures, no detailed explanation.

    Still looking for smiths to weigh in on my questions.

    Thank you.

  4. Remove Advertisements
    HKPro.com
    Advertisements
     

  5. #4
    Unrepentant HKHolic
    HK556WI's Avatar
    Join Date : Jul 2010
    Location : WI
    Posts : 2,180
    Mentioned
    13 Post(s)

    Default

    Quote Originally Posted by PTR_9CT_Soldat View Post
    Hi HK556WI,
    The pictures I posted are:
    1) OEM lower from my PTR 9CT (MP5 Clone)
    2) SEF Navy “Style” Clipped and Pinned Lower purchased from HK Parts.

    Your link shows pictures for a G3 PTR rifle, there are only pictures, no detailed explanation.

    Still looking for smiths to weigh in on my questions.

    Thank you.
    Semi-auto, clipped & pinned lower for your HK91-PTR91 or G3 clone.

    Factory G3 lowers do not fit onto semi-auto receivers. It is legal to convert a G3 lower to semi auto. This conversion is called "clip & pin". Once clipped & pinned the lower will hold your semi-auto trigger group and mount onto your semi auto rifle.

    This new German navy style plastic SEF lower has been professionally clipped & pinned by an HK gunsmith. Once installed you will have the look of an authentic full auto machine gun while maintaining a legal semi auto rifle.

    This lower will work on all HK91, G3, PTR91 rifles and other HK style 308 clones. New HK long axis selector is included.

    The tang is cut back to work on any other HK ie 93, 94 or clone of those.

    It does not effect the ejector.

    It is completely cosmetic.
    Last edited by HK556WI; 04-28-2020 at 11:06 PM.

  6. #5
    Junior Member
    PTR_9CT_Soldat's Avatar
    Join Date : Apr 2020
    Location : Idaho
    Posts : 29
    Mentioned
    0 Post(s)

    Default

    Hi HK556WI,

    Thank you for the additional info.

    I think I have figured it out.

    Thank you very much.

  7. #6
    Member

    Join Date : Mar 2020
    Posts : 66
    Mentioned
    1 Post(s)

    Default

    How hard was the dremeling? I plan on dremeling a navy ambi housing for my PTR 9ct this weekend. I’m kind if dreading it..

  8. #7
    Member

    Join Date : Jul 2019
    Posts : 98
    Mentioned
    0 Post(s)

    Default

    Quote Originally Posted by mistermcgoo View Post
    How hard was the dremeling? I plan on dremeling a navy ambi housing for my PTR 9ct this weekend. I’m kind if dreading it..
    Take your time. I used a variable speed dremel went real easy. Do a little test fit. Repeat.
    mistermcgoo likes this.

  9. #8
    Member

    Join Date : Mar 2020
    Posts : 66
    Mentioned
    1 Post(s)

    Default

    Quote Originally Posted by chopperbobby View Post
    Take your time. I used a variable speed dremel went real easy. Do a little test fit. Repeat.
    Got it installed today, all went smoothly. Like you said, I just took my time with it.

    Got my binary installed today, I’ll get try it out this Sunday.

    Quick question, do you find the trigger to be a bit gritty/sticky? Mine seems to be. It’s not terrible, but it’s noticeable. My stock PTR trigger is actually a lot smoother.

  10. #9
    Member

    Join Date : Jul 2019
    Posts : 98
    Mentioned
    0 Post(s)

    Default

    I don’t have a binary. My ptr trigger is great.

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

ptr 9ct lower

Click on a term to search for related topics.