Return to 8.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE MIL SPEC BARREL NUT

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Great product February 15, 2024 : Dusty Lee   Very nice quality and shipped fast. Great to deal with. Was this review helpful to you?

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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. Was this review helpful to you?

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Love this company July 22, 2021 : Nicholas Glenn from Birmingham AL   Great upper as always. Fast shipping and good quality. Highly recommend. Was this review helpful to you?

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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. Was this review helpful to you?

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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. Was this review helpful to you?

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July 3, 2020 : Thane Johnson from Spirit Lake, IA United States   MAS went above and beyond!! Thanks again guys Was this review helpful to you?

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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 Was this review helpful to you?

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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! Was this review helpful to you?

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May 7, 2020 : Jacob Wray from Hollidaysburg, PA United States   Was this review helpful to you?

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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!) Was this review helpful to you?