Return to 8.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE MIL SPEC BARREL NUT
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  0 of 0 people found the following review helpful:
 
5 of 5 Great product February 15, 2024
: Dusty Lee  
Very nice quality and shipped fast. Great to deal with.

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5 of 5 Great upper March 31, 2023
: CS from Wa  
You get a lot of top quality for the money on this one. If I had it to do over I would have added all the pieces in one order. Adding the BCG charging handle and hand guard all in one shot would have been better and cheaper for me.

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5 of 5 Love this company July 22, 2021
: Nicholas Glenn from Birmingham AL  
Great upper as always. Fast shipping and good quality. Highly recommend.

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5 of 5 Excellent Service May 3, 2021
: Keith Malone from Monroe, NC United States  
I purchased a 8.5” 300 Blackout barrel.  I had a few questions before purchasing.  I was very impressed that they responded so quick….actually got a response first thing the next morning on the 3 occasions I emailed their customer service.  I would definitely use them again….I would just like more product in stock and I would use them for everything.

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5 of 5 Awesome Attention to detail July 12, 2020
: Brian Rodriguez from Las Cruces, NM United States  
For what I was looking for i can say it was perfect.. i was completely blown away at the whole deal. I took 4 days and over a holiday?!!! Who does that?!! Well These guys do, and I'll gladly do business with them again for my sexy project.

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5 of 5 July 3, 2020
: Thane Johnson from Spirit Lake, IA United States  
MAS went above and beyond!! Thanks again guys

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5 of 5 awesome product July 1, 2020
: Gary Auman from Fayetteville, NC United States  
was exactly what I ordered and the best is you upgrade to what you want. thanks masdefense for a order that's awesome and right

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5 of 5 Great value June 25, 2020
: Kevin Zaccone from Hobart, IN United States  
Allowed me to build a fine rifle piece by piece, selecting every option. Solid barreled upper, key part of my build. Will be doing more business with MAS!

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5 of 5 May 7, 2020
: Jacob Wray from Hollidaysburg, PA United States  


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5 of 5 8.5" 300 BLACKOUT BARRELED UPPER April 27, 2019
: Kevin from IL United States  
This is a great choice if you want to customize your upper receiver and barrel but you don't have the tools to properly assemble it yourself.  The price was right and the processing/shipping was incredibly fast.  So would I buy from MAS Defense again?  I already ordered an 11.5" 5.56 NATO barreled upper and it just arrived today (3 days after ordering!)

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