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Thread: VLTOR MUR / Brownell's action block incompatability

  1. #11
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    bkb0000 is dead on, especially about the part of not using bbl blocks for bbl nuts. This puts a hell of a stress on the alignment pin and slot in the upper receiver. At least that's how I see it.
    Here is my preferred method. Complete with VLTOR MUR upper in the pic as well.
    I do NOT SOLELY use this upper receiver block however. I use it IN CONJUNCTION WITH a wood block on the TOP of the upper receiver.
    IOW's, rotate the pictured assembly 90 degrees, and throw a wood block in between the vise jaw and the flat top of the upper receiver.
    Voila... Strong, simple, and safe. (doesn't mar up the finish on your refeiver like that stupid Brownells clamping block either). Best method out there IMO....

    http://www.rainierarms.com/?page=sho...product_id=510
    "ROLL RIGHT SNIPER!"

  2. #12
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    Feb 2008
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    Thanks everybody. Helpful information here.
    Last edited by CCFP; 06-09-09 at 23:20.

  3. #13
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    Niantic CT
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    The problem with barrel blocks is that the barrel and upper receiver have a tendency to rotate when tightening the barrel nut.

  4. #14
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    Oct 2008
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    oregon
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    Quote Originally Posted by 5pins View Post
    The problem with barrel blocks is that the barrel and upper receiver have a tendency to rotate when tightening the barrel nut.
    i generally have to incorporate some other component with my shop-made blocks. stagger them, and roll the FSB behind the stagger for crush washers, or behind the receiver for un-tapped set-screw or clamp blocks. most of the load is still on the barrel, just gives it enough help to not rotate

  5. #15
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    Quote Originally Posted by Paul Cataldo View Post
    bkb0000 is dead on, especially about the part of not using bbl blocks for bbl nuts. This puts a hell of a stress on the alignment pin and slot in the upper receiver. At least that's how I see it.
    Here is my preferred method. Complete with VLTOR MUR upper in the pic as well.
    I do NOT SOLELY use this upper receiver block however. I use it IN CONJUNCTION WITH a wood block on the TOP of the upper receiver.
    IOW's, rotate the pictured assembly 90 degrees, and throw a wood block in between the vise jaw and the flat top of the upper receiver.
    Voila... Strong, simple, and safe. (doesn't mar up the finish on your refeiver like that stupid Brownells clamping block either). Best method out there IMO....

    http://www.rainierarms.com/?page=sho...product_id=510
    I have one of these. Had problems with the DD Lite Rail barrel nut and "bolt ring". Had to grind down the DPMS block a bit on one end.
    • formerly known as "eguns-com"
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    •eguns.com has not been actively promoted in a long time though I still do Dillon special
    orders, etc. and I have random left over inventory.
    •"eguns.com" domain name for sale (not the webstore). Serious enquiries only.

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