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Thread: What upper receiver holding block?

  1. #1
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    What upper receiver holding block?

    Is the dpms claw or the clam shell type preferred?

  2. #2
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    My take:

    1. I haven't used my clam shell-style in years.

    2. The DPMS upper block ("claw") is better for most applications. Be prepared to modify it slightly if you use Vltor MUR uppers. I use this for mounting scopes, sights, and similar non-torquing activities.

    3. For almost all uses involving torquing something attached to the upper (e.g., barrel nuts, muzzle devices) I use a Geissele Reaction Rod (best alternative).
    'That whole effort was held together by sweat, shame, and a tiny bit of pride.' -- Son of Commander Paisley

  3. #3
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    Quote Originally Posted by Amicus View Post
    My take:

    1. I haven't used my clam shell-style in years.

    2. The DPMS upper block ("claw") is better for most applications. Be prepared to modify it slightly if you use Vltor MUR uppers. I use this for mounting scopes, sights, and similar non-torquing activities.

    3. For almost all uses involving torquing something attached to the upper (e.g., barrel nuts, muzzle devices) I use a Geissele Reaction Rod (best alternative).

    Same here.
    Gettin' down innagrass.
    Let's Go Brandon!

  4. #4
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    The DPMS claw works, but you need to rotate the upper 90 degrees, so that the vise is clamping through the vertical axis of the upper

    On a budget? This works perfectly fine:
    https://www.plastixrevolution.net/co...ver-vise-block
    Want the nicer tool, that is a little faster, more convenient to use? This:
    https://geissele.com/ar15-m4-reaction-rod.html

  5. #5
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    I go with a Magpul Bev Block is budget was the main concern as it will handle both the upper and lower.
    Gettin' down innagrass.
    Let's Go Brandon!

  6. #6
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    Quote Originally Posted by elephantrider View Post
    The DPMS claw works, but you need to rotate the upper 90 degrees, so that the vise is clamping through the vertical axis of the upper

    On a budget? This works perfectly fine:
    https://www.plastixrevolution.net/co...ver-vise-block
    Want the nicer tool, that is a little faster, more convenient to use? This:
    https://geissele.com/ar15-m4-reaction-rod.html
    I have to admit that using the DPMS claw rotated like that never occurred to me. Then again, I still fool around with old A2 uppers with integral carry handles (at least sometimes), and that would not work well.

    Even with care and a block of soft wood to cover the Pic-rail on the "top" of a flattop upper, I would be a little trepidatious with that setup. Could be done though.
    'That whole effort was held together by sweat, shame, and a tiny bit of pride.' -- Son of Commander Paisley

  7. #7
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    Magpul bev block

  8. #8
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    Quote Originally Posted by joeg26er View Post
    Magpul bev block
    ^^ This ^^
    Tell my tale to those who ask. Tell it truly; the ill deeds along with the good, and let me be judged accordingly.


  9. #9
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    I use the PRI.
    I have literally built thousands of uppers on this.
    https://www.precisionreflex.com/Detail.aspx?PROD=186711
    "Perfect Practice Makes Perfect"
    "There are 550 million firearms on this planet. That's one firearm for every 12 people. The question is... How do we arm the other 11?" Lord of War.
    "I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them." Thomas Jefferson

  10. #10
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    Quote Originally Posted by CoryCop25 View Post
    I use the PRI.
    I have literally built thousands of uppers on this.
    https://www.precisionreflex.com/Detail.aspx?PROD=186711
    Does that little thumbscrew deal hold the rail tight wnough to do any work?

    This is what I use, plain-jane. No doubt made from scraps by high school kids:

    https://www.squirreldaddy.com/PRO-AR...p/sd20-131.htm

    The total arsenal:

    https://www.botach.com/kley-zion-bar...per-receivers/

    https://www.botach.com/kley-zion-ar1...fer-tube-bock/

    I know, they are clones, but I wouldn't have bought the buffer tube block in particular at the orignal's price of $100.00.
    Patriotism means to stand by the country. It does not mean to stand by the President... - Theodore Roosevelt, Lincoln and Free Speech, Metropolitan Magazine, Volume 47, Number 6, May 1918.

    Every Communist must grasp the truth. Political power grows out of the barrel of a gun. Our principle is that the Party commands the gun, and the gun must never be allowed to command the Party Mao Zedong, 6 November, 1938 - speech to the Communist Patry of China's sixth Central Committee

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