Return to 8.5" 300 BLACKOUT BARRELED UPPER - YANKEE HILL 7.23" KNURLED - BALLISTIC ADVANTAGE BARREL
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  0 of 0 people found the following review helpful:
 
5 of 5 Always excellent customer service January 12, 2020
: Mark Jackson from Inman, SC United States  
Bought a barrel - changed my mind and bought the upper - absolutely no hassle - RMA’s - or other time consuming still to deal with - just an email. I am a long term customer for a reason

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5 of 5 July 12, 2019
: Brady Culbert from Arlington, TX United States  
Great service and great parts. Great job you guys keep up the great work.

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5 of 5 300 Blackout upper January 27, 2019
: David Hackenberg from Trilby Cemetery Rd , FL United States  
Very nice upper

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5 of 5 MAS 8.5" .300 Blackout Upper November 16, 2016
: David M  
Man I love this upper! Fit and finish are great, no dings or blems, everything looks just as it should. Shipped quick and well packaged too! Shot this last weekend and she groups sub MOA with superand subsonic loads. Couldn't be happier, nice job MAS!

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5 of 5 8.5" 300 BLACKOUT UPPER - YHM 7.23" KNURLED August 8, 2016
: Jim L  
I received my upper in a week and a half after placing my order on a Saturd!Fit and finish is excellent. Initially testing, with fifty rounds, it ran perfectly. I shot 110gr V-Max supersonic and 175gr SMK subsonic loads.This upper produced the best accuracy of the four AR pistol uppers I own.I will purchase from them again, in the future.

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5 of 5 As expected July 12, 2016
: Greg G  
Perfect condition, perfect fit, perfect feel. All that anyone should expect from YHM.

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5 of 5 Service April 30, 2016
: Jon S  
Purchased the 300blk 8.5 inch barrell in a side charging upper. It came quickly and the quality is there. I have not shot it yet. After purchase I had questions and the staff were very helpful. Iwill purchase from MAS Defense again. Thanks

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5 of 5 8" 300 BLACKOUT UPPER - YHM 7.23" KNURLED December 19, 2014
: Tommy R  
I purchased this upper and I'm very happy with it. No complaints. Shoots like it should. Very accurate. Slapped an Eoteck on her. And now its good to go. It was delivered very fast. I will orderfrom MAS Defense again.

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5 of 5 8" barreled 300 blackout upper assembly September 20, 2014
: Joe E  
Works great with my cmng lower assembly. Good tight fit

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