Quad rail install question on S&W...

Discussion in 'AR Talk' started by HTTTRH, Dec 18, 2008.

  1. HTTTRH

    HTTTRH XDTalk Newbie

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    Can I ask about my S&W AR-15...hope so here goes..

    I gotta quick question, just bought a S&W AR and have ordered an AR-15 UTG Quad Rail Mid-Length Forearm 8.5" Mil-Spec Mount (Heres the link if u need more info... ARR-146 - AR-15 UTG Quad Rail Mid-Length Forearm 8.5" Mil-Spec Mount Replaces Original Hand Guards and Solidly Locks In Place) My question is on my AR at the front of the handguard I have a flat mount with no sight(flip up is ordered) now with this new quad rail being longer it seems I will have to move this sight forward, How do I remove the sight? How do I tell which side of it that I tap the pin out of the sight?(Owners manual does not say)

    Also will the gas tube remain or will I have to get a longer one, Im still learning alot of stuff so bear with me. I have loosened the allen bolt underneath the sight and just curious where I go from here if you know or can lend guidance and info on what you know and have learned. Thanks in advance -Steve
     
  2. JerzeyTransplant

    JerzeyTransplant XDTalk 100 Member

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    I have the UTG hand guard for my DPMS M4. The front end of the quad rail doesn't fit inside the cap. It is designed to go over the front end cap. That's why there are 4 allen screws to tighten down. It didn't seem right to me at first. I thought it wasn't the right size. Try to just fit the forward end over the front cap instead of inside it like the rear. Let me know if it helps.
     
  3. rudy64

    rudy64 XDTalk 100 Member

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    You speak blasphemy on this forum with that UTG speak!!! :shock:

    I got a lot of crap for just hinting that I like UTG.:shock::shock::shock:

    I hope wildrice doesn't see your post!!!:rolleyes:
     
  4. rudy64

    rudy64 XDTalk 100 Member

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    Oh, and does anyone have an opinion? Is a free float rail of any benefit on a 16 inch barrel (16 is too short to get affected by the weight)?
     
  5. John A.

    John A. XDTalk 2K Member

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    A freefloated rail (can) be a benefit to any length barrel. And barrel weight isn't necessarily the deciding factor for installing one in my opinion.

    The utg isn't a freefloating forend though if that's what you're comparing it to. It does nothing to float the barrel.

    It's just a fancy regular handguard with cupholders.;)
     
  6. Uraiit

    Uraiit XDTalk 100 Member

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    Yeah, a free-float is an entirely different beast than the UTG (as well as a lot of other pricey stuff).

    It's an accessory rail--nothing more.

    For the money though, you can't beat 'em.

    Like somebody else mentioned, it goes under the delta ring (near receiver), and clamps over the front ring.
     
  7. XDConvert9mm

    XDConvert9mm XDTalk 10K Member Founding Member

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    Ehhh, it's his rifle. No one here should care if he wants to hang potpourri bags off the trigger guard if that's what he wants to do. Not everyone has an unlimited budget to become the Tommy Tacticool of the AR World.
     
    Last edited: Dec 19, 2008
  8. ThumperMX113

    ThumperMX113 XDTalk 3K Member

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    Calm down Chief. :rolleyes:
     
  9. XDConvert9mm

    XDConvert9mm XDTalk 10K Member Founding Member

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    Nothing to calm down from Tonto. Just an observation and an opinion. :roll:

    Asking for info in this section of the forum can be very, very helpful.

    Asking for opinions is like trying to herd cats sometimes. YMMV.
     
    Last edited: Dec 19, 2008
  10. ThumperMX113

    ThumperMX113 XDTalk 3K Member

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    Not sure I follow, no one was being problematic until you two. So, isn't that like the pot calling the kettle black? I'd say so ...
     
  11. XDConvert9mm

    XDConvert9mm XDTalk 10K Member Founding Member

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    I'm not sure how voicing an opinion is "problematic" to you, but....whatever. Have a great night, OK?
     
  12. spyderdude

    spyderdude XDTalk 100 Member

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    I bought the UTG quad rails for my S&W M&P15, and they're of decent quality. I wasn't really willing to spend a small fortune on accessory rails, which is why I went with UTG. They're pretty secure, and don't wobble at all. So far I only have a UTG folding vertical grip on them, but will eventually put a light on it for those "bump in the night" situations.
     
  13. JerzeyTransplant

    JerzeyTransplant XDTalk 100 Member

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    To each his own. The UTG suits my needs too. I haven't had any problems with it at all yet except the vague installation directions.
     
  14. taylor6400

    taylor6400 XDTalk 1K Member

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    Well, Im a noob here too, but since nobody else is helping you out I will. Do you have pics of your front site? You say a flat mount; is it a rail, or is it just the gas block? I THINK typically to go with a longer HG you need a low profile gas block and then your rails go over that. But like i said, i dont really know. But nice weapon, i picked up a MP15A a couple months ago. Mine has standard front site and flip up rear.
     
  15. HTTTRH

    HTTTRH XDTalk Newbie

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    Its this model
    LE M&P Rifles -

    Model M&P15OR Rifle

    http://www.smith-wesson.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10001&catalogId=11101&langId=-1&productId=68442&tabselected=over&isFirearm=Y&parent_category_rn=51302


    Just a gas block/mount up front, just want a quad rail for a few reasons and it doesnt have to be Iraq ready or expensive just be solid and be there, thanks guys
     
  16. englandcrown

    englandcrown XDTalk 1K Member Founding Member

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    I'm pretty sure my GF ordered one of these for me for Christmas. I plan on installing it on my Stag. Are you pretty happy with it?
     
  17. Uraiit

    Uraiit XDTalk 100 Member

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    Not sure who you're asking, but I've had one for about a year, and it's been great.

    He already GOT help. There is no need to move the gas block at all. The rail clamps over the ring. If he got a mid-length rail, he got the wrong one, and removing the gas block is NOT going to help him.

    There is a gas hole in the barrel. Moving the block forward will do nothing more than cause his rifle to fail to function... :rolleyes:

    The UTG rail is not free floated, so it won't fit over a low profile block, without modification (and even then, I doubt it would be very sturdy).

    His options are kinda limited:

    1.) Return the mid-length, and exchange it for a CAR length rail.
    2.) Sell the mid-length to me, and buy a CAR length rail.
    3.) Purchase a new mid-length barrel, and install that.
    4.) Purchase a free-float rail, and a low-profile gas block.
    5.) Purchase a low-profile gas block, and a dremel, and try to modify the Mid-lenght rail to fit the CAR length front grip ring.
     
  18. Caligula

    Caligula XDTalk 100 Member

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    Weren't asking me but I have the UTG on one of my MP15's and it's fine. No complaints at all.

    And HTTRH it sounds like you got a mid-length quad rail and you need a carbine length one instead. Once you get the car-length rail it is easy to install, I did it in about 5 minutes.
     
    Last edited: Dec 19, 2008
  19. taylor6400

    taylor6400 XDTalk 1K Member

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    Ah...I see. I knew you cant MOVE your gas block, but i also wasnt aware of the NFF rails will not fit over the block. But now that i think about it, yep it makes sense. Personally, i bought my MP15 "A" model because I had been wanting one and then it was when the panicking started, and i knew the one i found was at a good price. BUT they also had the tactical model, and now i REALLY wish i would have dropped the extra jack for that. Stupid accessories and tacticool look...its addicting.
     
  20. Caligula

    Caligula XDTalk 100 Member

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    I have both.:mrgreen:
     

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