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MUR Modular Upper Receiver

  • The MUR-1S (no forward assist)
  • Detail of the MUR's precision machining
  • All MURs come with M4 Style Feed Ramps
  • MUR-1A

Product Description

The Modular Upper Receiver (MUR) is a rigid MilSpec flat-top upper receiver made to fit all AR15/M16/M4 rifles and carbines. The MUR was developed to give the customer a MilSpec correct upper receiver with a thicker wall, making the MUR upper receiver a stronger platform. This more rigid upper receiver will increase accuracy and reliability, while extending the life of the interfacing components, such as the bolt carrier group and barrel assembly.

The main benefit of the MUR is that it is dimensionally correct. Vltor ensures reliability and accuracy of our production process by using precision machining equipment, thorough quality control inspections, and a 100% final check of all critical dimensions. When you own a Vltor MUR, you have the highest quality upper receiver available on the market today.

The MUR is made from a 7075 aircraft-grade aluminum forging. Prior to machining, the forging is fully stress relieved, heat treated, aged twice and undergoes a proprietary cryogenic treatment. The MUR is precision machined and each part finished by hand. There is not a  better upper receiver available.

The MUR comes in two models: one with a Bolt-Assist/Shell-Deflector and the second with a Shell Deflector only. Vltor offers the selection at the time of purchase, but does not offer  a  service to exchange the Bolt Assist or Shell Deflector. All MURs feature a MilStd-1913 scope mounting rail and come equipped with an Ejection-Port, Dust Cover Door.



We recommend that you use the DPMS Panther Claw or the Geissele Reaction Rod  for installation. Damage could incur if you use clamp style mounting blocks or blocks that do not support the upper internally. This could void your warranty.


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Product Reviews

Showing reviews 1-10 of 11 | Next

  1. The Best

    Posted by Judy on 30th Sep 2014

    The Vltor "MUR" upper receiver is quite possibly the best upper on the market. When my husband and I purchased my AR/CAR15 from a local shop in Arizona he was shocked at how high dollar weapons for civilians had changed in quality. Being a retired Navy armorer he is used to working with better quality parts that are not cast steel with a low chrome content. He said some parts were little better than "Airsoft" quality. That said we kept the lower receiver and M4 barrel and started over.
    After the makeover with nickel steel fire control parts and military Magpul furniture the upper project got started. The Vltor "MUR" was a perfect match for the lower. He added a J P ENTERPRISES bolt group with a Vltor charging handle and muzzle break. Top it off with an EoTech sight and it is perfect. The Vltor "MUR" upper is very well built and the fit is perfect with all parts. It also looks great and adds that professional look. Now, it's a reliable tack driver. He could have not built such a well balanced "AR" without that Vltor "MUR" upper. Thanks Vltor! A++++

  2. Top shelf

    Posted by Unknown on 22nd Aug 2014

    Great upper, unique look, high quality equipment!

  3. Better than my Colt upper

    Posted by Dave Slavik on 2nd Aug 2014

    I have a Colt LE6920 and I was not happy with the finish of the upper (too many chips). After research I decided on the Vltor MUR. Being made of 7075 and heat treated twice it appeared to be of higher quality compared to others. It did not disappoint, the fit was mil-spec with absolutely no play, pin holes were accurate and the pic rail true. The finish is improved over the Colt; it is not chipping and is more rugged. The M4 feed ramps were exact with a smooth transition to the barrel with no discernible edges. The other thing I notice is the brass defector, the deflector is more rounded and slightly different than my stock deflector, the rounds eject the same and I no longer see that little dimple on my spent rounds caused by the sharp edges on the Colt deflector. Buying this upper improved the overall quality of my AR and I very pleased with its finish and performance, the cost was a little more but well worth it, it will be the upper on my next rifle.

  4. looking...looking...

    Posted by Unknown on 15th Jul 2014

    Was looking for an upper with unquestionable quality. Vltor was the answer.

  5. Gold standard

    Posted by Unknown on 14th Apr 2014

    Excellent workmanship, well finished, this is the gold standard upper.

  6. Ran over with 3500

    Posted by Jarhead on 12th May 2012

    Im unbelievably impressed with this upper. Unique design, outstanding performance & fit, well thought out upper! I am a very picky consumer and I firmly believe in quality and this upper has it all. I even went as far as running it over with my HD 3500 and it wanted more! I cant say enough about VLTOR products. You get what you pay for. This is my second "complete" VLTOR build and couldn't be happier. There are some people that say Im crazy for spending that kind of $ on a build and that they could build 2 AR's for the price of my 1. But there the ones fixing there guns at the range why Im out there Kick'n A__!!!

  7. Outstanding Quality

    Posted by Ken on 15th Jun 2011

    Fit and finish was perfect. Will be used on a full blown AR project gun. You cant go wrong with this upper.

  8. Awesome

    Posted by John on 7th Oct 2010

    Matched perfectly with my noveske lower! Couldn't ask for better fit, finish, and Quality.Perfect match for my MK12 MOD0.
    I would recommend it to everyone and will be purchasing another!

  9. Impressied

    Posted by Walter on 22nd Sep 2010

    JUst like Darth Vader once said: "Impressive. Very Impressive!"

    It's a great match to my 6.8 SPC barrel and JD lower.

    Perfect, form, fit, and function.

  10. MUR worth the wait!

    Posted by Davd Jacks on 1st Jul 2010

    One of the best uppers, if not the best upper out there in relation to strength,fit,finish,and it mates up perfectly to my Daniel Defense lower.

Showing reviews 1-10 of 11 | Next

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