Return to 6" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE NERO 5.5" M-LOK RAIL - BALLISTIC ADVANTAGE BARREL
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5 of 5 Quality at an affordable price June 12, 2020
: Ronald Jones from Manning , SC United States  
I recently bought a 6” 300 blkout upper and was very pleased. I ordered on a Tuesday afternoon and received Saturday morning. Was so impressed by the turn around time I’ve placed another order this week.

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5 of 5 10/10 June 6, 2020
: Adrian Perales from Edinburg , TX United States  
I love it

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5 of 5 300 blk build May 28, 2020
: from NC ,United States  
Ordered upper for pistol build. So far it has ran flawlessly .The fit and finish are on point,and overall I am with purchase.

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5 of 5 Great Upper May 21, 2020
: Zaid Quraishi from San Antonio , TX United States  
Amazing upper! Qualify is so great and high end. Everything is perfect about it. Can’t wait to take it out to range and shoot it.

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5 of 5 May 20, 2020
: from Hunington Beach, CA United States  


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5 of 5 Sweet upper! May 6, 2020
: Jason from Highlands , NC United States  
I shopped around and this upper was the best deal with high quality parts. Even with high demand, shipped in 2 days!!

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5 of 5 Great product and price April 23, 2020
: Casey O from Rochester Hills, MI United States  
I have been looking for a short (less then 7.5inch) but still effective barreled upper for a 300blkout build I'm working on. I was fortunate to stumble across MAS Defense in my searching, having never seen any of their products I did a bit of research and liked what I saw. I purchased the 6inch barreled 300blkout upper they offered and was really happy with the price, several other companies offer a similar upper but at a substantial price increase for basically the same level of quality. Once I recieved the assembly the fit and finish were first rate and everything went together nice and smooth. I WILL be coming back to MAS Defense for future projects, thank you for a top notch and reasonable us made product!

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5 of 5 January 5, 2020
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