Return to 11.5" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE 12.62" MW8 OCTAGON M-LOK RAIL
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4 of 5 Great looking products and great service December 1, 2023
: Britton Jones from American Fork, UT United States  
I ordered the 11.5 mw8 upper from them and it's by far one of the coolest looking uppers I've owned, the one issue I had was magazines not seating all the way from what I assume was clearance issues. I called and let them know the issue and they sent me a return label and told me they would replace the receiver free of charge! Super great service and I'd recommend them for sure, hoping the new receiver works as well but I know they'd take care of me if it didn't.

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5 of 5 AR upper June 14, 2020
: Ricky Long from La Mirada, CA United States  
Very nice fit and finish

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5 of 5 Another great upper! June 13, 2020
: ANDY S. from BRIARCLIFF, TX United States  
Just got an 11.5" 5.56 upper to go with my 300 BLK shorty from MAS Defense. This is where I get all of my uppers from, and I'm totally happy with that. Really nice builds that function as they should, all at the best prices on the web.

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5 of 5 MAS Defense Delivers June 11, 2020
: III%er from Eagle , WI United States  
What can I say. Price is right. Quality work is really good, and functions flawlessly. Wining combination. My new go to for parts. Thank you MAS Defense! Keep it up!

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5 of 5 High quality June 10, 2020
: Kris  
Arrived lightly coated in oil, good fit & finish, functions 100%. Quality is really really good, especially considering the price.

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5 of 5 Quality and aesthetics May 21, 2020
: Jordan L from Texas  
Looks amazing on my pistol lower. Quality work and machining. Shoots accurate and have no complaints.

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5 of 5 Just what i was looking for April 1, 2020
: Jeff Benyo from Paso Robles , CA United States  
Good looking upper functions well, switched the rail out with a 15 inch rail and my suppressor fits inside it that is what i was hoping for purchasing this upper

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5 of 5 Great upper March 26, 2020
: Brandon Mohair from Cedar hill, TX United States  
I received my upper in great condition. Shipping was fast. I’m highly satisfied with my purchase.

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5 of 5 Fantastic to work with December 19, 2019
: landoawd from Hillsborough, NC United States  
Second purchase from MAS and wouldn't hesitate to buy again. Had a very specific need and an upper was built to suit.

Great company

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