Looking for dimensions on AR-10, DPMS .308, POF 308, SCAR mk17s or similar bolts
Close
Login to Your Account
Likes Likes:  0
Results 1 to 8 of 8
  1. #1
    Join Date
    Aug 2015
    Country
    SWEDEN
    Posts
    23
    Post Thanks / Like
    Likes (Given)
    2
    Likes (Received)
    1

    Default Looking for dimensions on AR-10, DPMS .308, POF 308, SCAR mk17s or similar bolts

    Hello,

    I'm looking for the dimensions of the bolt heads of the type mentioned in the title. I'm trying to figure out the dimensions of the 7/8 lug design bolt head and I'd like to be able to compare with a finished design. I've only got 2 lug rifles here at home. I have found plenty of ar-15 bolt drawings and CAD files online, but I suppose it's not just a linear scaling to get accurate dimensions on the lugs and such.

    Help and tips appreciated!

    cheers

  2. #2
    Join Date
    Oct 2012
    Country
    UNITED STATES
    State/Province
    Washington
    Posts
    190
    Post Thanks / Like
    Likes (Given)
    125
    Likes (Received)
    38

    Default

    I could maybe help as I am just finishing a DPMS AR10. Been a fun project so far but I have yet to shoot it to see if any bugs exist before I apply a finish to it. Maybe if you made a sketch and indicate the dimensions needed I could help you out.
    I put a 26" heavy stainless on mine as I have never had a true long range rifle before. Sights are a VORTEX 6x24 with LR reticle. Lets see what I can do at 600 yards and beyond!

    The very best of Christmas to you and yours and may a Happy and Fruitful New Year follow.

  3. #3
    Join Date
    Aug 2015
    Country
    SWEDEN
    Posts
    23
    Post Thanks / Like
    Likes (Given)
    2
    Likes (Received)
    1

    Default

    I hope this image clarifies what I'm looking for! By D I mean the "depth" of the lug, a dimension along the axis of the bore or firing pin.

    Thank you for your kind christmas wishes! I wish that you and your dearests have a joyful christmas!bolt-face-dimensions.jpg

  4. #4
    Join Date
    Feb 2001
    Country
    UNITED STATES
    State/Province
    Arizona
    Posts
    2,218
    Post Thanks / Like
    Likes (Given)
    4
    Likes (Received)
    353

    Default

    OK, these numbers are from an ASA308 bolt:

    A (width of lug): .179" at base, .159" at top (note that lugs are trapezoidal, not rectangular)

    B (height of lug): .125" by measurement, .115" by computation ([.890 - .660] / 2) or .113" ([.890 - .664] / 2)

    C (dia of bolt head): .6605" immediately behind lugs, .664" between lugs

    D (dia over opposing lugs); .890" (2 pairs) or .891" (over other pair)

  5. #5
    Join Date
    Aug 2015
    Country
    SWEDEN
    Posts
    23
    Post Thanks / Like
    Likes (Given)
    2
    Likes (Received)
    1

    Default

    Thank you so much! Making up bolt designs is a very soothing and enjoyable Christmas activity , for when the discussions with the lovely in-laws are on hold.


    Quote Originally Posted by GGaskill View Post
    OK, these numbers are from an ASA308 bolt:

    A (width of lug): .179" at base, .159" at top (note that lugs are trapezoidal, not rectangular)

    B (height of lug): .125" by measurement, .115" by computation ([.890 - .660] / 2) or .113" ([.890 - .664] / 2)

    C (dia of bolt head): .6605" immediately behind lugs, .664" between lugs

    D (dia over opposing lugs); .890" (2 pairs) or .891" (over other pair)

  6. #6
    Join Date
    Feb 2001
    Country
    UNITED STATES
    State/Province
    Arizona
    Posts
    2,218
    Post Thanks / Like
    Likes (Given)
    4
    Likes (Received)
    353

    Default

    You might also post your request on ar10t.com for measurements from other brands.

  7. #7
    Join Date
    Sep 2010
    Location
    Oklahoma City, OK
    Posts
    4,693
    Post Thanks / Like
    Likes (Given)
    807
    Likes (Received)
    1937

    Default

    Awesome info, thanks.

  8. #8
    Join Date
    Feb 2019
    Country
    UNITED STATES
    State/Province
    Colorado
    Posts
    4
    Post Thanks / Like
    Likes (Given)
    0
    Likes (Received)
    0

    Default

    RifleConnection.com has models to all the AR-10 .308 stuff. I recently downloaded their .308 builder package a ton of cad models included. Great resource.


Tags for this Thread

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
  •