Magpul MBUS Front Sight Post Problems

Discussion in 'Shooting Gear and Storage' started by zshaw8442, Nov 21, 2010.

Thread Status:
Not open for further replies.
  1. zshaw8442

    zshaw8442 Member

    Joined:
    Nov 14, 2010
    Messages:
    15
    Ok first off I know that the general consensus of Magpul mbus sights are that they would melt on a railed gas block. However, I still want to put these on my dpms sportical AR-15. Since there is an obvious height difference between the rail on the gas block and the rail on the upper receiver, could I just buy a taller post for the front sight or would this cause problems?

    I have also tried different rail risers and they are not able to work with the stock front sight posts. The only thing that seems like it would work would be a taller front sight post.

    Thanks in advance for any of your inputs.

    This is also my first post. I am looking forward to this new community.
     
  2. Mags

    Mags Member

    Joined:
    Apr 8, 2009
    Messages:
    3,235
    Location:
    Belgium
    You need to get one of the following: sights made for gas block height, a taller gas block, a ff rail, or a riser block. I have noticed the riser blocks do not always align sights properly.
     
  3. 68wj

    68wj Member

    Joined:
    May 2, 2010
    Messages:
    1,654
    Location:
    Upstate
    Magpul recommends not mounting the MBUS on a railed gas block. Plastic and hot gas blocks tend to cause trouble.;)
     
  4. zshaw8442

    zshaw8442 Member

    Joined:
    Nov 14, 2010
    Messages:
    15
    Thanks for the replies guys. I know that Magpul recommends to not mount them on there but I already have them mounted on my gas block and I don't shoot than many Rounds or fast enough for it to get that hot. As for risers, they will not work. They make the front post too high. Any problems with getting a taller front post to screw upwards to make up for the height difference?
     
  5. Mags

    Mags Member

    Joined:
    Apr 8, 2009
    Messages:
    3,235
    Location:
    Belgium
    My MBUS came with 2 pins for the front sight. A long one and a short one, the longer one is just for this situation. If it doesn't work then I think you either need a ff rail or the right sight for a gas block.
     
  6. zshaw8442

    zshaw8442 Member

    Joined:
    Nov 14, 2010
    Messages:
    15
    Ok thanks. My mbus only cam with on post. I guess I will need to look around for a longer replacement post. Thanks again for the help.
     
  7. Mags

    Mags Member

    Joined:
    Apr 8, 2009
    Messages:
    3,235
    Location:
    Belgium
    No, not two posts. Two pins, you know the thing that locks the sight post in position. The longer pin allows the post to be locked in position in a more extended position instead of a flush fit.
     
  8. zshaw8442

    zshaw8442 Member

    Joined:
    Nov 14, 2010
    Messages:
    15
    Oh ok wow. I would have never thought of that. I will have to check that out when I get home.
     
  9. zshaw8442

    zshaw8442 Member

    Joined:
    Nov 14, 2010
    Messages:
    15
    Ok well I guess I might have got a different generation that you have. Mine didn't come with any pins to adjust the elevation. Here are some pics of the one that I have. Is yours the same?

    http://m1087.photobucket.com/albums/zshaw8442/Mobile%20Uploads/?pbauth=1_uLEBonVPfaLdh1h3YMYz2d5I%2BTCO5S4qn28Z75tG1RyGUMJortr84v46Qjdymgw9ILDZViN60fn5vHHAOj0JoPeciVqDSV32YlNLUyJI0DWgPnJDVg9pmC82X8unbSAAU5WTwwl%2FY%2FNC7QETwYb3iNFVacBwfxUuDP1hoUS%2BRzA%3D
     
  10. Mags

    Mags Member

    Joined:
    Apr 8, 2009
    Messages:
    3,235
    Location:
    Belgium
    Same one I have. In the box with the instructions was a little bag with the other pin and the instructions on how to use it. I bet with Magpul being the great guys they are they would send you one if you called 'em up and was polite.
     
  11. zshaw8442

    zshaw8442 Member

    Joined:
    Nov 14, 2010
    Messages:
    15
    Ok thanks Mags for all your help. I will definitely do that soon.
     
Thread Status:
Not open for further replies.
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice