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What size riser?

Discussion in 'Black Rifle Forum' started by a_tack, Oct 17, 2011.


  1. a_tack

    a_tack
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    I have this rifle:
    http://www.dpmsinc.com/firearms/firearm.aspx?id=56
    If I were to mount say a 30mm-40mm tube style red dot on it, how tall of a riser would I need to keep the front sight post from interfering with the red dot? I understand that I will likely still be able to see the sight post through the scope, which doesnt really bother me, I just dont want it to be in the way.
     

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  2. crazymoose

    crazymoose
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    You want a mount set up for a lower 1/3 co-witness (the sights will take up the bottom 1/3 of the red dot tube).
     

  3. gunsmoke92

    gunsmoke92
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    I have one riser that is about 3/4" tall and places the iron sites about halfway up the red dots' lens. One about 1/2" tall should co-witness in the lower third of the lens. I had one on my Bushmaster set up like that. When co-witnessed with front and rear iron sights, I adjusted the red dot so it appeared on the tip of the front sight pin. The red dot marked the target and the irons kept a fine line on things. If the red dot failed, I was still in the fight.

    [​IMG]
     
    #3 gunsmoke92, Oct 18, 2011
    Last edited: Oct 18, 2011
  4. MrMurphy

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    www.laruetactical.com

    Find your optic, they have the correct mount.

    If they don't, you probably don't have the right optic.

    Think about that.
     
  5. WoodenPlank

    WoodenPlank
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    Bingo.

    Assuming you have a Comp M2/3/PRO, the LT-129 is the mount you want. Cantilevered, has a waterproof compartment for an extra battery, and puts the front iron sight in the bottom third of the tube.
     
  6. a_tack

    a_tack
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    Thanks for the info and links. I really can't justify a $400+ optic on a $650 rifle just for plinking. I'm probably going to go cheaper than that. I'm looking for less than $100 and then trying to match up a riser to it.


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  7. WoodenPlank

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    If it's a pure range toy, I'd look at Primary Arms. They get a lot of good reviews on their Aimpoint clones, and they're pretty inexpensive. No offense to the guys at PA, but I wouldn't run one on a weapon I'd be betting my life on, but they seem great for range use.
     
  8. MrMurphy

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    Agreed.
     
  9. a_tack

    a_tack
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    Thanks! I'll look into them. My gun is a pure range toy. Do they also need risers or do they come with higher mounts?



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    #9 a_tack, Oct 18, 2011
    Last edited: Oct 18, 2011
  10. WoodenPlank

    WoodenPlank
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    Yep, they offer 1/3rd cowitness mounts for the Aimpoint clones. Their "high" mounts should be what you need.

    Marshal from PA posts on here from time to time, and they have a great rep on customer service.
     
  11. mvician

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    PA Micro in the ADM mount from Primary Arms. :cool:


    [​IMG]
     
  12. MARSH1

    MARSH1
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    All our red dots offer AR specific mount options. The M4 style comes with a integrated AR mount. Take a look here and let me know f you have any questions.

    https://www.primaryarms.com/Primary_Arms_s/586.htm

    Thanks
    Marshall