Return to 10.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE NERO 12.62" M-LOK RAIL

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Great products, great customer service. August 26, 2022 : John Lindt from Creswell, OR United States   This was not my first purchase from MAS Defense, but by far the most impressive. For starters the products have all been above satisfactory. The quality fit and finish of each item I have received hasn't been anything less than perfect. With this particular item,because its sized was more than what would fit in my neighborhood mailbox, it would end up on my porch, that was not good for me, so I opted to have it shipped FedEx to my work. I recieved a call from Mario confirming this was indeed me and the address I wanted the product sent to. I actually really appreciated that, and it's service like that that guarantees return business. If I ever need anything and MAS sells it, that's where I'm getting it. Don't ever change MAS defense. PS and they threw in an awesome koozie Was this review helpful to you?

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Second upper June 7, 2021 : Harry from BOCA RATON, FL United States   This is the 2nd upper I have purchased from Mas defense. Both are top notch in quality and look amazing. I've made several other purchases from them and all were shipped quickly with email updates and tracking. For anyone looking for a great custom looking build that's accurate and doesn't cost thousands, you absolutely can't go wrong here. Was this review helpful to you?

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Looks great February 3, 2021 : Frederick Stevenson from Franklin , TN United States   Upper arrived fast. The build it self is constructed really sturdy. No loose screws everything is tight. Can’t wait to fire it in a week or so. Was this review helpful to you?

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Very happy July 4, 2020 : Jay Chapman from Haughton, LA United States   The fit and finish was excellent. Haven't had a chance to shoot yet but as this is my 3 rd ballistic advantage barrel and everything else seems to be perfect. I expect no issues. Delivery time was excellent. Was this review helpful to you?

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December 17, 2019 : Dustin Dennis from MIDLAND, NC United States   Was this review helpful to you?

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10.5 barrel w/ 12.6 hand guard!!! December 12, 2019 : James Hoffman from Weatherford , TX United States   So this is my first 300 blkout and I don’t know why I waited so long to get into this! MASDEF is in point with their products! I did the proper barrel fouling with some descent enough ammo, then moved to some higher end not so cheap BTHP 125gr, this shoots sub MOA w/ minimal expense!!!! Buyer beware......you’re gonna need a lot more bullets! Was this review helpful to you?

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Very satisfied December 10, 2019 : William Leigh from Perry, GA United States   Very happy to finally get my upper in the mail! Overall quality seems great Was this review helpful to you?

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Beyond what I expected December 6, 2019 : Micah Lewis from Lima, OH United States   Well MAS defense did it again.  My order Was 2 days early and boy is it amazing.  Slapped it on my built lower and it runs like a champ.  I will order from then from now on for everything AR related.  Now if they can just add 6.5 creedmoor complete uppers and beyond .450 bushy .458 socom .50 Beowulf heck even get into the big boy game .300 win mag or .338 lapua.  Still won’t stop me they impress me every time no matter what.  Thanks MAS Defense once again.   Was this review helpful to you?

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Perfect March 1, 2019 : Aaron from Maryland   Ordered this upper with a few upgrades. Was built and shipped within two days. Came in exactly how I wanted. Will definitely be dealing with these guys more Was this review helpful to you?

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Excellent upper November 29, 2018 : Kevin from North Dakota   This is my first order from MAS and won’t be my last. The customer service was great from the get-go and the quality of the parts far exceed the price tag. Was this review helpful to you?