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What hand guard for M&P15 OR?

Discussion in 'Black Rifle Forum' started by Robreynolds, Nov 23, 2012.

  1. Robreynolds

    Robreynolds Registered User

    56
    0
    Apr 5, 2008
    I bought a M&P15 OR a few months back and I'm thinking I would like to replace the round hand guard with a quad rail. I seen lots of choices in plastic and metal. I want to get the Magpul MBUS flip-ups to go along with my Tru-Glo red dot but I've been told not to put them on the gas block. What would be my best choice that is not too expensive and can I go with a longer rail or am I stuck with the same length as what is on there now because of the gas block?
     
  2. I'm no expert but I think I've seen a few longer rails made with cutouts for the gas block.
     


  3. I'm having the same issue and I'll be following this post. I love the Troy alpha rail but $170 is out of my range for a 13" hand guard. I'm a bit cheap so anything remotely close to the alpha rail for less I'm interested in.

    Sorry op not trying to jack your thread but my search for cheap sights all lean towards the MBUS sights. Was gonna jump on primary Arms deal on Troy flip ups but they only have the rear for $80 and once again $200 for sights is a little rich for my blood.


    Posted using Outdoor Hub Campfire
     
  4. bmoore

    bmoore

    4,373
    5
    Jan 15, 2006
    Under a regime.
    It would be hard to beat a Daniel Defense rail. If you want extension beyond your gas block nothing is going to be cheap.
     
    Last edited: Nov 23, 2012
  5. M&P15T

    M&P15T Beard One

    21,835
    3,861
    Apr 7, 2011
    Arlington, VA.
    Correct me if I'm wrong, but I believe the OR has a picatinny railed flat FSB that allows a BUIS to be mounted, right?

    If so, it won't fit under any quad rail, so if you want a rail to cover up your gas-black/sight base, you will need to switch to a low-pro gas block, and then you can get into either a Daniel Defense or Troy quad rail.

    One positive with the Troy rails, are that they work using the normal barrel nut, instead of needing a specialized barrel nut (which requires removing the barrel/nut/gas bock/muzzle device) to mount to like the Daniel Defense rail does.
     
    Last edited: Nov 23, 2012
  6. LAWDOGKMS

    LAWDOGKMS

    1,252
    33
    Jun 11, 2001
    TX
    I paid $69 for a CMMG aluminum quad rail, that seems just as nice as anything out there..bought it at my local gun store..
     
  7. bmoore

    bmoore

    4,373
    5
    Jan 15, 2006
    Under a regime.
    Even when I first got into AR's and bought junk, I still knew that it was not that good.
     
  8. You're right m&p15t they have a picatinny railed gas block. I've been considering buying an a2 sight gas block and chopping it down to fit. Just as a cheaper alternative


    9mm Mountaineer
     
  9. M&P15T

    M&P15T Beard One

    21,835
    3,861
    Apr 7, 2011
    Arlington, VA.
    Do you mean as a cheaper alternative to a lo-profile gas block?

    I would imagine buying a lo-pro wouldn't be too expensive, versus buying a standard FSB and cutting it down. More important, and more difficult, is getting either one installed properly, so your AR functions right.
     
  10. I looked up some low profile blocks and primary arms had one for under $10 if I remember correctly, I've seen a replacement or two done on YouTube and I'm semi mechanically inclined so I think after I find a 11-13" rail that I can afford I'll try to replace it.

    I'm looking for an alpha rail clone pretty much I love the look


    Posted using Outdoor Hub Campfire
     
  11. Toby196

    Toby196 Fetching a rug.

    Yep, you're right. Midway sells a YHM low-profile gas block for $23, while their cheapest A2 FSB is $26. :dunno:
     
  12. fivestar

    fivestar

    481
    9
    Oct 15, 2004
    I have Troy rails on mine. I've been very pleased.
     
  13. high ground

    high ground

    274
    0
    Dec 23, 2002
    VA
    Troy makes a nice drop in battlerail.


    Outdoor Hub mobile, the outdoor information engine
     
  14. SFW

    SFW

    182
    1
    Jan 24, 2007
    Republic of Texas
    Has anyone used the drop in Troy quad? I'm looking into this one to replace the stock forend and have seen conflicting information about whether or not you can mount optics to it.
     
  15. WoodenPlank

    WoodenPlank Who?

    7,958
    3
    May 15, 2010
    NW Florida
    You should avoid optics on any non-monolithic railed fore ends, as it can result in a wandering zero. Some rails are better than others, obviously, but primary optics should be mounted only on the upper receiver.

    Sent from my DROID BIONIC using Tapatalk 2
     
  16. SFW

    SFW

    182
    1
    Jan 24, 2007
    Republic of Texas
    Gotcha. The light that I have has a laser on it. That would be the only real "aiming" device installed on the rail. This is going to be a KISS rifle, and my primary sight will be irons.
     
  17. TangoFoxtrot

    TangoFoxtrot OIF 04-05

    4,272
    80
    Sep 10, 2008
    Nowhereville, USA
    I'll catch hell for this but.....I've been using a UTG quad rail with great sucess. Its even held up under run and gun sessions...and it was only $60.
     
  18. mjkeat

    mjkeat

    3,447
    3
    Jun 17, 2009
    Midwest
    OP, yank the railed gas block and replace it w/ a low profile version. After that cut off the delta ring on your barrel nut. From there install a Troy Alpha rail. More often than not quad rails aren't needed and add dead weight.
     
  19. If the Troy rails weren't so freaking expensive that's what I'd do, need to find a used one or cheaper alternative. That's a lot of practice ammo for a budget gun lover


    9mm Mountaineer
     
  20. mjkeat

    mjkeat

    3,447
    3
    Jun 17, 2009
    Midwest
    The Alpha is one of the least expensive quality tubes available.