Results 1 to 9 of 9

Thread: Machine work to upper receiver

  1. #1
    Join Date
    Nov 2010
    Location
    FL
    Posts
    628
    Feedback Score
    41 (100%)

    Machine work to upper receiver

    John Thomas recommended me a gunsmith to do this work. I ordered a super duty Geissele complete upper . The rail and upper receiver have a key lock tab for anti rotation purposes. Being a lefty I don’t like upper receivers with forward assists. I’m going to have him replace the factory Geissele upper with a vltor mur upper (no fa). He’s going to machine a recess into the vltor mur upper for the rail to lock into it with the key tab.

    Would doing this to a vltor mur upper compromise or weaken the upper?


    Pic
    https://imgur.com/a/UCqLLX6
    Last edited by snackgunner; 01-13-20 at 18:25.

  2. #2
    Join Date
    Mar 2011
    Posts
    1,412
    Feedback Score
    1 (100%)

    Machine work to upper receiver

    Never mind, I looked at your image. I thought you were talking about the anti rotation tabs.
    Last edited by Inkslinger; 01-13-20 at 18:41.

  3. #3
    Join Date
    Nov 2010
    Location
    FL
    Posts
    628
    Feedback Score
    41 (100%)
    Look at the pic
    It’s the g mk16 10.5”

  4. #4
    Join Date
    Mar 2011
    Posts
    1,412
    Feedback Score
    1 (100%)
    Quote Originally Posted by snackgunner View Post
    Look at the pic
    Itís the g mk16 10.5Ē
    Roger. I didnít scroll down far enough before I commented. My uneducated guess would be that you would be able to mill the MUR without weakening anything. I highly doubt that Geissele had any super proprietary uppers forged for them in order to mill that slot out.

  5. #5
    Join Date
    Feb 2011
    Location
    Colorado
    Posts
    354
    Feedback Score
    3 (100%)
    Post pics after it’s together, sounds like a robust setup.

  6. #6
    Join Date
    Jun 2012
    Posts
    2,449
    Feedback Score
    8 (100%)
    That specific handguard is only available on a complete "Super Duty" upper.

  7. #7
    Join Date
    Nov 2010
    Location
    FL
    Posts
    628
    Feedback Score
    41 (100%)
    Quote Originally Posted by scooter22 View Post
    That specific handguard is only available on a complete "Super Duty" upper.
    Correct I ordered the super duty complete upper and am going to switch out the receiver

  8. #8
    Join Date
    Jun 2012
    Posts
    2,449
    Feedback Score
    8 (100%)
    Quote Originally Posted by snackgunner View Post
    Correct I ordered the super duty complete upper and am going to switch out the receiver
    Ah, sorry.

    Do you really think the juice is worth the squeeze?

    Do you want the MUR for possible increases in accuracy?

  9. #9
    Join Date
    Nov 2010
    Location
    FL
    Posts
    628
    Feedback Score
    41 (100%)
    Quote Originally Posted by scooter22 View Post
    Ah, sorry.

    Do you really think the juice is worth the squeeze?

    Do you want the MUR for possible increases in accuracy?
    Yes if it will not compromise the upper receiver it’s worth it to me to not have the forward assist. Geissele or some company produced upper receivers for their super duty uppers with these cutouts so I figured it would be safe for a competent gunsmith to do the same thing to a mur upper

Bookmarks

Posting Permissions

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