Return to 7.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE NERO 7.25" M-LOK RAIL

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Great customer experience May 17, 2026 : Mark Whalen from Hayden, ID United States   Great communication and follow up, Great product, excellent quality and workmanship. THANK YOU Was this review helpful to you?

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Nice, short, the right color, perfect December 25, 2025 : Michael Diaz from Monroe, NC United States   This is my second FDE upper.   It showed up packaged well, shipped fast.  It's the right color and perfect just like the last one.   These are a great deal and hitting the target 170 yards out, which is tough to do in a short configuration. Was this review helpful to you?

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7.5" 300 BLACKOUT AR-15 BARRELED UPPER March 16, 2024 : Charles Cramer from Nanty Glo, PA United States   Great quality, well crafted exceeds expectation. Was this review helpful to you?

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300 blk upper January 18, 2024 : Eric Snavely from Lusby, MD United States   This upper feels good and functions great will definitely you this company in the future Was this review helpful to you?

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Non-Shooting Review August 10, 2022 : C Valencia from FV, NC US of A   The quality of this upper is excellent! Well made/designed and Im looking forward to get it to the range soon. Was this review helpful to you?

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7.5" 300 BLACKOUT December 17, 2021 : BRUCE HALL from Midway, GA United States   `GREAT COMPANY SELLING GREAT PRODUCTS Was this review helpful to you?

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May 23, 2019 : Michael Weber from Springville, AL United States   Great looking upper! I really like the hand guard. Can't wait to take it too the range. Fast Shipping!! Was this review helpful to you?

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Incredible value November 14, 2018 : Houston from CA United States   I have been using Mas defense components for years now. You cannot beat the value you get with their products without spending a whole lot more. Everything has been reliable and consistent. Was this review helpful to you?

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Great upper! November 10, 2018 : Shawn Lanier from Elkview, WV United States   The complete uppers I saw on the site looked great for a couple of builds I am doing. I ordered 1 to check it out before buying another. I received it yesterday and mounted it immediately. It looks great! The amount of parts I could melonite was a plus. The website upgrade selections was a nice feature. Buying another soon! Was this review helpful to you?

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Competitive price with better barrel selection April 1, 2018 : Justin G   Finding .300 BLK assembles uppers in 1:7 twist proved difficult, thankfully MAS Defense allows you to pick and choose among various lengths and finishes. Many competitors in this sector only offer 1:8twist. Upper arrived inside of one week. Quality seems great. Havent got out to shoot but am impressed with the finish, the hand guard is slim and comfortable. The flash hider was timed properly. For the money I couldnt be happier. Was this review helpful to you?