Return to 12.5" .308 AR-10 DPMS GEN1 BARRELED UPPER - MAS DEFENSE NERO 12.62" M-LOK RAIL
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  0 of 0 people found the following review helpful:
 
5 of 5 Great experience May 17, 2026
: Mark Whalen from Hayden, ID United States  
These guys are the best, they called me to let me know that they had just finished asse.bly and testing and were packaging and shipping that day, best customer service I  have ever had and a quality good looking product.

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5 of 5 Amazing September 25, 2025
: ROB from Miami, FL United States  
Ran flawless, quality, and beautiful upper.

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  0 of 0 people found the following review helpful:
 
5 of 5 Ar 10 upper September 18, 2025
: Bill MASON from Davenport, FL United States  
Looks great

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  0 of 0 people found the following review helpful:
 
5 of 5 10/10 couldn't be more pleased May 5, 2025
: Tyler  
Built as advertised and shipped pretty quickly. So far ive put it on a PSA lower and it runs without any issues or malfunctions no matter what I feed it honestly I couldn't be happier with the product they've sent me will be buying from you guys again

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  0 of 0 people found the following review helpful:
 
5 of 5 Outstanding upper October 27, 2024
: Frederick Ledger from Temple, TX United States  
I've purchased 2 of these uppers from mas, I was super impressed with the attention to detail and quality. If you want a battle rifle set up this is a excellent start. Also grab a stoner 5.3oz 308 buffer with it, the combination is absolutely insane.

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  0 of 0 people found the following review helpful:
 
5 of 5 .308 pistol upper April 15, 2022
: Aaron Huch from Forest Hill, MD United States  
Great product! Delivered quickly in great packaging. I cannot wait to get my build out to the range.

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  2 of 2 people found the following review helpful:
 
5 of 5 12.5" .308 AR-10 BARRELED UPPER January 18, 2022
: Alex Kari from Naugatuck, CT United States  
Was looking for a shorter barreled upper in .308 or 6.5 creed. Had a lot of trouble finding one at a reasonable price. Got one from MAS in .308. Great product at a great price. Looking forward to finishing my build and hitting the range.

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  1 of 1 people found the following review helpful:
 
5 of 5 The best BANG for your BUCK ! May 4, 2020
: Sergio Lomeli from Commerce , CA United States  
this is by far the best 12.5" upper for my .308 build, The quality is amazing and the shipping department does a great job protecting the upper during transit. i would recommend this upper for any one looking for a short barreled upper. Mas Defense is my go-to company when it comes to quality in my AR builds

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  1 of 1 people found the following review helpful:
 
5 of 5 Always pleased April 25, 2020
: Thomas  
As usual MAS defense pulls through with quality affordable products that never cease to amaze me with the quality compared to cost I always come back

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  0 of 0 people found the following review helpful:
 
5 of 5 Always pleased April 25, 2020
: Thomas  
As usual MAS defense pulls through with quality affordable products that never cease to amaze me with the quality compared to cost I always come back

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