Return to 8.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE NERO 9.87" M-LOK RAIL - FDE
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  0 of 0 people found the following review helpful:
 
5 of 5 Amazing product and service April 20, 2023
: John Nguyen from Portland, OR United States  
The website was very user friendly and ordering was easy. My upper receiver arrived within a week.

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5 of 5 Customer Care is excellent November 11, 2021
: DANIEL from South Milwaukee, WI United States  
I had a few questions I emailed Customer Care they called me back. One of the few companies I work with who Customer Care will call you back immediately he did a great job

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5 of 5 Excellent Customer Support June 7, 2021
:  
They worked with me to put together an upper that wasn't listed on the site, and had it together and shipped to me in just a couple of days. The upper itself is excellent, lightweight, and well crafted.

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5 of 5 I love Mas Defense March 4, 2021
: Ricky from ALEXANDRIA, IN United States  
A few years ago, I built my first AR and got my barrel from mas defense. It's been great and never had an issue. Started a 300 Blkout build and came back to mas defense. I haven't shot with the built upper I received from them yet, but it arrived quickly and in perfect condition. Thanks a lot guys, super impressed with your work.

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5 of 5 Great quality April 10, 2020
: RC from Dulce, NM United States  
I couldn't be happier with my new Mas defense upper.

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5 of 5 June 19, 2019
: jose arroyo from MIAMI, FL United States  
Product looks good I have not shot it yet.

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5 of 5 Very happy! February 17, 2019
: Andrew Skeen from Brooklyn, OH United States  
I recieved my upper and was SUPER excited to shoot it! On top of being a VERY well made product I recieved  free merch with my purchase. With that being said I will definitely be making more purchases and will prefer Mas Defense to EVERYONE I know!

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5 of 5 My first .300 aac January 12, 2019
: J.C. from Enterprise, AL United States  
I really enjoy the fit and feel of the upper, well put together, and FDE color is an exact industry match. Unfortunately I have not fired it yet (but it is test fired at MAS DEFENSE so I am not so worried) since I am still assembling the lower.

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