Return to 16" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE GROUNDWORKS 15" M-LOK RAIL - MID LENGTH GAS W/ BCG & FCH

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Fast processing and shipping April 26, 2021 : James Watson from Iuka, IL United States   We all know parts are hard to come by right now and alot of places are behind.  I ordered this fantastic upper and recieved it just 3 days later. Was this review helpful to you?

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Barreled upper April 22, 2021 : from Kunkletown, PA United States   I received this upper and was please with the quality and workmanship. I have told other’s about your fine product. Was this review helpful to you?

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Excellent service April 15, 2021 : Jeffrey from Pa   What a fantastic experience in these bizarre-o times! I placed my order for a full, barreled upper, it shipped in two days and I received it in 6 days, counting a weekend. Couldn’t be happier with my decision thus far! Was this review helpful to you?

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Amazing April 8, 2021 : Michael   I truly feel I got more than I paid for. Shipping was fast and everything came in perfect functioning condition. Glad I went with MAS Defense Was this review helpful to you?

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MAS Complete Upper Receiver April 5, 2021 : Ernesto Agudo from Garden Valley, CA United States   High quality, affordable. Fast shipping. Was this review helpful to you?

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Finally got the upper. April 5, 2021 : from Tennessee   I’d been waiting for the ar15 bolt carrier group to come back in stock what seems like forever. Then I found this combo that included the upper, bcg and ch. at first I wasn’t too keen on the mlok compared to picatinny, but it’s working out just fine since any attachment I’d use is available for mlok. As for the upper, the quality is great. It’s lighter than I expected. And out of the box with a red dot shoots very well IMO. Not a single complaint but lots to commend. Ty Mas Defense. Was this review helpful to you?

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Tacticool asf March 27, 2021 : from Bakersfield , CA United States   Beautifully made looks great Was this review helpful to you?

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Great first impressions March 26, 2021 : from SAN DIEGO, CA United States   This isn't the first time I've purchased from MAS, and it definitely won't be the last. Shipping was fast, quality is great, and I think MAS at the end of the day makes a better product than most of the other budget oriented companies selling firearms parts/accessories. Even though I haven't had the chance to shoot this upper, when I pulled it out of the box I was truly impressed. For the price you're getting a reliable BCG that is properly staked, a long lasting melonite treated barrel, and great machining/finishing on the handguard.  You can tell MAS takes pride in their work. Buy it, you won't be disappointed. Was this review helpful to you?

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Super Fast Shipping and Amazing Upper March 11, 2021 : from Charlotte, NC United States   Finally completed my AR build with this upper went to try it out it shoots like a dream! Solid complete upper especially for the price. Mas Defense is such a great company and they do amazing working. Was this review helpful to you?

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AR lower parts... March 10, 2021 : Charles Conley from Belmont, NC United States   MAS Defense shipped out Monday, and USPS was knocking on the door Tuesday. I have been satisfied with MAS Defense since I found them. Only regret is I wish I would have found them sooner. Need a 6th star.. Was this review helpful to you?