MAS Defense is my go-to provider of complete uppers for almost all of my AR builds. I've never had a complaint about the quality of product I've received. I also appreciate the customization options available. I will continue to use them as my preferred provider.
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Impressive blackout
June 23, 2024
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Cameron Allen from Frankfort, IN United States
Very well put together, fittings are spot on and it’s a must try. Mildly light for a 16in barrel, lots of clearance and multi purpose with the Mlok rail added on definitely a C clamp capable. I’m also impressed with this the company, manufactures, and having amazing customer service. If ya have any questions or concerns they will be more than happy to help you out. Keep up the great work, also I’ll be keeping them on my radar to see what they bring to the market.
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Great company to deal with
September 11, 2023
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Tyler Randolph from White Rock, NM United States
Ordered the upper and had a quick response on a part they didn’t have and they explained some things I did not know about the 300 blackout pistol and carbine gas systems and got it shipped out fast. Upper came packaged nice and secure and all parts are very nice quality. I will buy from MAS defense again for sure! Very impressed
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300 black out
November 4, 2022
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Craig Hill from Kunkeltown, PA United States
Perfect! In every way! Love it! Came to me ready to go!
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Better than expected
September 17, 2022
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Gabe Belsha from Sedalia , MO United States
Quality of upper far surpassed my expectations. The finishing touches and appearance are great. Mounts to my Aero lower perfect.