Return to 10.5" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE 12.62" MW8 OCTAGON M-LOK RAIL
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5 of 5 A great substitution March 4, 2026
: Christian VanDyke from Pittsboro, NC United States  
I waited about 3 months to buy an upper from MAS, the one I wanted was always out of stock so I selected this one instead. Nice style and suppressor ready. No issues with dings or chips in paint and it came with the correct parts I picked. Happy so far can’t wait to shoot

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5 of 5 Ar15 upper April 28, 2024
: Robert Demery from Spring Lake, NC United States  
The few things I've order from Mas defense have been awesome.fast Shipping great prices I will definitely be buying more accessories and stuff



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5 of 5 Excellent Service---Thank you Mas Defense May 15, 2020
: ENC Gunner from Eastern, NC United States  
I was introduced to Mas Defense by my local gun shop...I've purchased several items including 3 barreled uppers. Mas Defense's quality is second to none and the never disappoint.  Thank you!

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5 of 5 May 14, 2020
: John Barker from Mooresville, NC United States  


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5 of 5 10.5 Upper May 6, 2020
: Jer N from Norridge, IL United States  
I’m glad I found you guys online. Great build quality, good customer service and over good experience.  I will definitely be buying more from your company.

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5 of 5 MW8 10.5 April 30, 2020
: Mark T from NV United States  
This is my first pistol length upper, MAS defense was really fast in fulfillment despite the Covid-19 going on.  Fits well on an Aero pistol lower w/bcm parts, shot a few mags and it worked perfectly with no jams with hex mags and a nitride BCG. PS the handguard is on the larger side but works well in terms of keeping the barrel cool.

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