AR sights

Discussion in 'Rifle Country' started by andrewdl007, Dec 24, 2021.

  1. andrewdl007

    andrewdl007 Member

    Joined:
    Mar 3, 2007
    Messages:
    364
    Location:
    VA/NJ
    My father recently bought a Smith and Wesson Sport II AR. I told him to get one with iron sights but when he showed it to me, it’s the version with no sights just a rail. I now need to get him something so that it is useable. I assume there is no way to get iron sights for it since there is no front sight, so if I’m stuck with a red dot, what do you recommend?
     
  2. ericuda

    ericuda Member

    Joined:
    Jan 7, 2012
    Messages:
    1,356
    Location:
    nwkansas
    Absolutely nothing wrong with a red dot. I think they bring more enjoyment than iron anyway. Whats your budget.
     
    shoobe01 likes this.
  3. uzimon

    uzimon Member

    Joined:
    Apr 17, 2007
    Messages:
    218
    Location:
    Houston,Tx.
    Pretty sure you can mount a sight on the gas block or either to that handguard or another handguard
     
  4. coloradokevin

    coloradokevin Member

    Joined:
    Mar 22, 2008
    Messages:
    3,278
    Without a picture it's hard to say, but a lot of rails are perfectly capable of holding a front sight. But, there's nothing wrong with a red dot (I like Aimpoint, among others) or a LPVS (low power variable scope - I carry a 1-8x Trijicon on a work rifle).
     
    Peakbagger46 likes this.
  5. uzimon

    uzimon Member

    Joined:
    Apr 17, 2007
    Messages:
    218
    Location:
    Houston,Tx.
    A buis is always a good idea in case an optic fails or gets broken
     
    Peakbagger46 likes this.
  6. redcon1

    redcon1 Member

    Joined:
    Jul 22, 2008
    Messages:
    880
    Location:
    Northern Ohio
    It looks like you could get detachable flip up sights and mount them both easily enough as there's a rail on the gas block and you would still have room for whatever optic you want. It would be pretty sweet actually. I'd probably put a vortex strike eagle 1-8x or similar scope on a quality return to zero mount on that rifle but that's just my preference.
     
    gobsauce likes this.
  7. Ethan Verity

    Ethan Verity Member

    Joined:
    May 8, 2021
    Messages:
    429
    If you really want irons, you can get a front sight that mounts on the gas block. Just make sure it's a pinned gas block, because if it is clamp on this could potentially make it rotate if bumped.
    A2FrontSight.jpg
     
    kcofohio likes this.
  8. CapnMac

    CapnMac Member

    Joined:
    Feb 27, 2009
    Messages:
    14,517
    Location:
    DFW (formerly Brazos County), Texas
    Holosun H503G will work just fine.
    And will cost about as much as a good set of Magpul MBUIS.
     
    kcofohio likes this.
  9. sarduy

    sarduy Member

    Joined:
    Apr 13, 2007
    Messages:
    3,218
    Location:
    United States of America
  10. wiscoaster

    wiscoaster Member

    Joined:
    Sep 19, 2019
    Messages:
    3,639
    Location:
    Nowhere
    If it's a full-length rail just get yourself a pair of Magpul flip-up sights (or any other brand of matching front and rear sights) and mount them on the rail. Eazy Peazy. If it's not a full-length rail the front sight needs to be a gas-block mount sight else they won't line up right.
     
    JDGray and gobsauce like this.
  11. imac98374

    imac98374 Member

    Joined:
    Mar 31, 2011
    Messages:
    116
    Location:
    South Texas
    What’s the role that he wants this rifle to fill?

    Plinker? Lower cost red dot vs variable optic vs irons. Advise metal for the front sight at the very least. If he shoots quickly the gas block will heat up. Potentially to plastic melting temps.

    Defensive? Spend a little more on a nicer red dot vs irons.

    I would recommend the Daniel Defense sight set if you go that route.

    https://danieldefense.com/ar-15-iron-sight-set.html

    Simple and sturdy.

    If you decided on a defensive optic.

    https://aimpoint.us/aimpoint-patrol-rifle-optic-pro-red-dot-reflex-sight-with-qrp2-mount-and-spacer-2-moa-12841/
     
    Last edited: Dec 25, 2021
    DR505 likes this.
  12. P89DCSS

    P89DCSS Member

    Joined:
    Aug 7, 2014
    Messages:
    448
    Location:
    `Merica
    If it's this one it looks as if there's a short picatinny rail in the front you could mount a front sight to. Maybe Magpul MBUS.
    smith-and-wesson-mp-15-sport-ii-556-ar15-rifle-optics-ready.jpg
     
    bassjam likes this.
  13. DMW1116

    DMW1116 Member

    Joined:
    Oct 10, 2020
    Messages:
    2,602
    Just remember that gas block mounted front sights need to be all metal to handle the heat generated in the gas block.
     
    chicharrones, Demi-human and kcofohio like this.
  14. edwardware

    edwardware Member

    Joined:
    Feb 23, 2010
    Messages:
    4,273
    I run fixed (no flip up), metal (not plastic), iron sights on all my ARs, railed and not. Every brand of AR accessory maker has 2+ styles. I particularly like MidWest and Daniel Defense for rears, but my rail-mounted fronts are all UTG Slim Fixed Low Pro, made in Taiwan.
     
    sarduy likes this.
  15. BigBlue 94

    BigBlue 94 Member

    Joined:
    Dec 5, 2018
    Messages:
    3,279
    Location:
    The Great American Prairie
    Keep in mind that gas block rails come in two heights, and likewise so do sights. If it is like the pic above, you need a handguard height front sight. If the gas block rails is lower, get a sight for gas block height.
     
    chicharrones likes this.
  16. P89DCSS

    P89DCSS Member

    Joined:
    Aug 7, 2014
    Messages:
    448
    Location:
    `Merica
    So the front mini picatinny rail is also the gas block? And a metal sight is required as plastic will melt? (Thanks, I'm new to ARs)
     
  17. wiscoaster

    wiscoaster Member

    Joined:
    Sep 19, 2019
    Messages:
    3,639
    Location:
    Nowhere
    Yes, in the pic you posted the mini front rail is integral to the gas block. Kind of an unusual configuration, to come in the box that way. But the front and back rails are level with each other so you could mount a rail-mounted flip-up front sight, so long as it's made from metal, and any rail-mount flip-up rear sight. Only Magpul's top-of-the line sights are metal, and they're expensive. UTG / Leapers makes decent metal sights that should work just fine for you. Make sure, though, that you don't accidentally buy the "gas-block-mount" front sight because it will be too high for that set-up. Been there, done that. Twice. :oops:
     
    BigBlue 94 and P89DCSS like this.
  18. BigBlue 94

    BigBlue 94 Member

    Joined:
    Dec 5, 2018
    Messages:
    3,279
    Location:
    The Great American Prairie
    I have a fixed UTG sight on one of my rifles. Very pleased with it, especially the serrated face that is facing the shooter. It reduces glare. Not sure id trust one of their folders or not.

    There is also the option of a gas block with flip up front sight. This would replace the short railled gas block you have now. I have one from midwest industries on my scoped AR.

    Ive bought a range of folding sights from $25 up to $125. As long as they are metal, the quality is usually decent. But like anything, the expensive ones are noticably nicer.
     
  19. DMW1116

    DMW1116 Member

    Joined:
    Oct 10, 2020
    Messages:
    2,602
    I’ve wondered how that all works. I went with a traditional front sight tower for a dedicated AR15-A4 but I dug for a while trying to find out what the F-marked sight meant.
     
  20. CapnMac

    CapnMac Member

    Joined:
    Feb 27, 2009
    Messages:
    14,517
    Location:
    DFW (formerly Brazos County), Texas
    Yes, if you peek in through the top of the fore end, you ought see a tube running from the front block back to the receiver.
    Now, would that block get hot enough to melt Magpul polymer? Maybe--that would take a lot of rounds in a very short amount of time, and while uncomfortable to human touch, probably not in the range to soften modern polymers.

    Now, a cheaper set of thermoplastic BUIS? Maybe.

    Now, there's an excellent argument for the angled offset BUIS, which leaves the centerline "clean" for optics of whatever sort.
    A review (for what it's worth): https://www.firearmreview.com/best-offset-iron-sights/
     
  21. BigBlue 94

    BigBlue 94 Member

    Joined:
    Dec 5, 2018
    Messages:
    3,279
    Location:
    The Great American Prairie
    An F marked A2 front sight block is for flat top receivers, detatchable carry handles included. A NON-F-Marked one is for A1/A2 integrated carry handle upper receivers.
     
  22. P89DCSS

    P89DCSS Member

    Joined:
    Aug 7, 2014
    Messages:
    448
    Location:
    `Merica
    Thanks for all the clarification. My AR has a floating barrel but I was interested to understand the other half's ARs are configured.
     
  23. wesmonster

    wesmonster Member

    Joined:
    Jul 19, 2019
    Messages:
    164
    I have an AR with a railed gas block like the one pictured above.
    Should be the same height as the receiver rail so any add on or flip up sight should work.

    as mentioned, I’d avoid polymer, while they may not flat out melt they can get soft enough to deform with recoil over time. I HAVE seem a Magpul flip up ruined with heavy mag dumps in a short time.

    Yankee Hill Machine also makes a nice metal flip up front sight for tall railed gas blocks.
     
    BigBlue 94 likes this.
  24. HJ857

    HJ857 Member

    Joined:
    Jun 14, 2007
    Messages:
    667
    I have this on one of my lightweight AR's. I think it's great. Very easy to install. I centered the post by using a zeroed red dot optic and then aligning the dot with the rear sight and turning the front until the post lined up with the other two, then removed the red dot. Sight radius is much improved and works great if you have older eyes. It changes the "look" of the rifle though, if that's a big deal for you.

    I'm using an old, fully metal flip up rear sight. Could be a UTG product, I don't remember, but I do know that I like it a lot better than the Magpul I have on a different rifle. The sight picture is cleaner.

    https://www.tactical-life.com/gear/optics/ar-15-fixed-clamp-on-front-sight/
     
  25. wiscoaster

    wiscoaster Member

    Joined:
    Sep 19, 2019
    Messages:
    3,639
    Location:
    Nowhere
    Re: barrel clamp-on front sight on a free-floating barrel? I dunno ... sounds to me like it would affect barrel harmonics and thus accuracy. Though I suppose if it's sighted in with the clamp-on sight installed, it really doesn't make a difference, as it's a "permanent" fixture. Anybody that knows more about free-floating barrel harmonics please fill us in ...
     
  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