Return to 8.3" 9MM AR-15 BARRELED UPPER - MAS DEFENSE NERO 9.87" M-LOK RAIL
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5 of 5 High quality! February 23, 2024
: Jake from ID United States  
Very solid upper and well built. Just the right weight for what I was after.

had heard great things about MAS Defense products so I figured I would give them a try. Ordered this upper and found out for myself that MAS provides great products for a great price. Customer service was excellent and shipping was quick. I highly recommend this company and will use them again

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5 of 5 Top tier January 6, 2024
: Roger Workman from Mint hill , NC United States  
I have bought multiple times in the past and I absolutely swear by MAS defense uppers assemblies!

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5 of 5 January 17, 2022
: William McDonald from Bakersfield, CA United States  


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5 of 5 September 3, 2021
: Gregory Saunders from Desert Hot Springs, CA United States  


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5 of 5 Great February 17, 2021
: Gray Shale from United States  
Order was perfect.  Upper is very good quality and well assembled.  Shipped exactly as stated on website.  Will shop here again!

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5 of 5 7.5" 9MM AR-15 BARRELED UPPER - MAS DEFENSE NERO 9 January 21, 2021
: Mike S. from GA United States  
Perfect upper for pistol length. Slapped on lower and sighted in same day, worked great.

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5 of 5 Barreled upper April 18, 2020
: Tim Nieman from Lakeland , FL United States  
Came in looking really good just like the 10.5” I purchased before. Can’t wait to shoot it.

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5 of 5 Awesome company May 12, 2019
: Theodore Juett from Hoover, AL United States  
This is my second complete upper from MAS!!!! I am extremely satisfied. They build to order and ship quick. I appreciate that they allow you to select the parts you want. Great job!!!! It shoots awesome too!!!

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