Return to 10.5" 9MM AR-15 BARRELED UPPER - MAS DEFENSE RIDGELINE 9.87" M-LOK RAIL

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0 of 0 people found the following review helpful:

9mm upper May 17, 2025 : Jerry Wheeless from Jacksonville, NC United States   This is my second  9mm upper great product. MAS has alway been above and beyond  on everything that they do.  Really a good group and a pleasure to do business with. Was this review helpful to you?

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Perfection November 17, 2024 : Matt Crouchet from Onalaska, TX United States   Bought my Mas Defense 9mm upper and would works flawlessly and appeared exactly as it did on the website. Very happy with everything about buying these parts from Mas Defense Was this review helpful to you?

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Upper review May 9, 2024 : Benjamin Maggart from Ossian, IN United States   The entire upper looked amazing is exactly what I wanted and exactly what I ordered. I will also continue doing more purchases through mass defense for the quality of the material that is supplied. Was this review helpful to you?

0 of 0 people found the following review helpful:

Complete Upper is Awesome January 15, 2024 : Christopher Bordelon from Alexandria, LA United States   I received my 9mm 10.5" MAS Defense Ridgeline upper and all I can say is WOW!!!! I was lookiing to build a AR style 9mm PCC and had looked at several uppers.  I was going to go with another company but after Thanksgiving, almost all of their complete uppers and a good portion of their uppers were sold out.  So I went on the hunt and found this complete upper.  From what I can tell this is exactly what I was looking for in a complete upper.  The rail is what sold me when I saw this company.  When I finally got it and assembled it to the lower from my AR rifle it felt and looked great.  Still have some work to do though as I will have to get a complete lower now as well as a Colt style magazine magwell adapter. Also have to get another muzzle device as the one I had ordered from KAC was for the other lower and has the incorrect thread pitch on it.  Ill know how great it is once I put some rounds through it but as far as looks and what I was looking for, this upper is everything I wanted. Was this review helpful to you?

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9mm ridgeline upper assembly March 23, 2022 : Geoff Fritzges from Wyalusing, PA United States   Upper is awesome! Still building my pcc but the finish and quality is fantastic. The fde is a perfect match. Shipping was also fast AF!! Will def be back for more Was this review helpful to you?

0 of 0 people found the following review helpful:

High Quality! October 12, 2020 : LKC from London, KY United States   Ordered on Tuesday and received it Friday! Extremely well packaged and lightening quick shipping. Looks and felt well built. Cleaned and mounted sights and assembled it with a 5.56 lower I had using Endomag inserts in Gen2 Pmags. Everything locked up tight as it should. Using the black nitride BCG available from MAS Defense. It ran flawless with this setup and I am ecstatic with it. Just ran two full mags thru her with no FTF or FTE  60 rounds sent down range and I'm a happy camper. I Was looking to get the short 4" version but sadly it wasn't in stock so I settled for the 10" upper. With that said folks don't hesitate to buy from these guys awesome experience with them!!!  This vet is happy. Side note hit me up when you get the 4" in stock so I can get it also. 😋 Was this review helpful to you?

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VERY NICE PRODUCT October 12, 2020 : from LAKE HAVASU CITY, AZ United States   Will continue following your web site. Thank You Was this review helpful to you?