Return to 16" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE NERO 12.62" M-LOK RAIL - MID LENGTH GAS
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5 of 5 Very pleased April 15, 2021
: John Ferranti from MARLBOROUGH, MA United States  
Upper fit and finish were nice and tight. No scuff or marring marks.

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5 of 5 Great item March 26, 2021
: Charles Small from N Brookfield, MA United States  
Solid feels good finish is really nice.  Exactly what you'd hope to receive and its well put together.

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5 of 5 Superb! March 26, 2021
: Patrick from Minden, NV United States  
I’m thinking MAS is the best bang for my buck.
Their Glock barrel shoots like my KKM barrels and their uppers perform like my Wilson Combat....value and service with this outfit and their stuff.

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5 of 5 March 5, 2021
: john scott from east berlin, PA United States  


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5 of 5 Good March 5, 2021
: Anthony Rivers from Butler, PA United States  
Good upper for the price, fast turn around especially during covid

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5 of 5 Excellent Upper February 17, 2021
: Midwest Buyer from United States  
Mas Defense has the best prices with the best materials and options. My second upper purchased and just as solid as the first. No blemishes, nitride barrel and gas tube, for the same cost as competitors phosphate uppers. On my short list of great parts suppliers.

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5 of 5 February 12, 2021
: Karen from Houston, TX United States  


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5 of 5 At upper February 4, 2021
: Daniel Hann from Moorpark, CA United States  
Everything came as ordered, great quality and on time delivery!

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5 of 5 Impressive upper! February 1, 2021
: Michael G. from Hope Hull, AL United States  
This was my first purchase from MAS defense, but certainly won’t be my last. Even with cheap 55gr fmj’s and a red dot I was able to put up several 3 shot groups that were under 1 moa on my first outing. No feeding issues whatsoever. Really like the hand guard more than I thought I would. Just wish it had been available in a little bit longer length, but certainly happy with the looks and the feel of it. Fit my aero precision lower perfectly. For the money you can’t go wrong.

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5 of 5 Great product February 1, 2021
: Brian from Easley, SC United States  
This is the second upper I recently ordered from you guys.  The quality is great.  I am very pleased with the product and your service.  I will definitely be back.

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