Return to 10.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE 12.62" MW8 OCTAGON M-LOK RAIL
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5 of 5 Amazing build quality August 8, 2024
: Roswell LaPierre from Dallas, TX United States  
I am very happy with the build quality and look of my 300 BO upper. I still haven't fired it yet but it seems to be very good quality materials. I loved having the different options like changing to an Ambi charging handle and color options. Much appreciate it guys.

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5 of 5 Very well made! December 26, 2023
: Cody from Daniel Island, SC United States  
Received an upper from MAS Defense and it attached to my lower flawlessly. This unit is well constructed and works great with my accessories.

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5 of 5 300 blk upper April 28, 2023
: Jody Starnes  
I really like this upper. Looks great . They stayed in touch with me during the process and shipped it out to me quickly.   Haven’t shot it yet because still building the lower. But I expect no issues.  Thanks for everything, will buy from you again. 👍

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5 of 5 Will update May 15, 2020
: Ryan from LOS ANGELES, CA United States  
You guys make a nice product at a great price, so I can’t complain. But I gotta hit the range with it. So far, you guys seem like a stand up company.

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5 of 5 Excellent Upper May 13, 2020
: from NC United States  
Quick shipping, excellent deal to include the BA barrel. Hope to be out shooting soon.

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5 of 5 300 blackout barreled upper April 15, 2020
: Alex Williams from Lafayette , LA United States  
Great product. Shoots awesome. I’m loving the finish on the laxer engraved emblems as well

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5 of 5 300 Blackout barreled upper April 5, 2020
: Kevin Foster from Blue Ridge, TX United States  
This upper came in exactly as described. I can't wait to put some rounds down range with it.

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