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:

First assembled upper I've bought February 12, 2019 : Michael Eells from Fort Campbell, KY United States   The overall quality of the parts used was excellent. Parts were aligned and installed correctly. Even got a follow up call from MAS and learned something new. I wont hesitate to buy from MAS again. Was this review helpful to you?

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Great Customer Service!!!!! December 7, 2018 : Mike Simpson from NC   The Crew at MAS came through again. In less than a week and a half, my barreled upper was ready for pickup. Was this review helpful to you?

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300 BLKOUT February 12, 2018 : Paul L   I got to shoot this build on 2/11/18 and it ran flawlessly only ran 40 rounds and had just bore sighted the red dot grouping was pretty good considering the shortness of the barrel. Delivery and packaging were pretty fast and efficient. The communication dept could use a little work. I will purchase from them again. I like the idea MAS allows you some nice options for your build but wish they offered spiral and diamond fluted on these pistol barrels....Thanks MAS Defense and keep up the good work.....Paul Was this review helpful to you?

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8.5" 300 BLACKOUT UPPER - MIL SPEC BARREL NUT June 6, 2017 : John P   Great product. Delivery time was better than expected. Was this review helpful to you?

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8.5" Side Charging Upper March 14, 2017 : Andrew C   Looks and functions exceptionally! I ordered from MAS Defense a few years ago when building my 5.56 SBR, and was happy to do the same for my 300 Blackout. Their customer service is top notch, my ordershipped the d after I clicked on "purchase". I've recommended MAS Defense to may people looking to purchase either parts or the entirety of a firearm. MAS Defense - Keep doing exactly what you're doing, and you've got a customer for life. Was this review helpful to you?

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7.5" 300 blk upper October 16, 2016 : Jared H   Can't wait to finish building my sbr. Price was great, fast shipping, great quality. I'll definitely buy from here again. Was this review helpful to you?

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8.5 300 Blackout barreled upper March 12, 2016 : Eric S   Ordered and received in less than a week- fit, finish, quality all seem very good and well worth the cost. I have not gotten it to the range yet but was so impressed I just ordered a 10.5 5.56 barreled upper! You may be my new go-to barreled upper supplier...... Was this review helpful to you?

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8.5 300 Blackout barreled upper February 13, 2016 : John F   Mas Defense has the best selection of 300 blackout upper around supper fast shipping. The 8.5 inch upper I purchased looks great and shoots even better. Was this review helpful to you?

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Excellent! September 27, 2015 : DALLAS A   This is the 3rd barreled upper I've purchased from MAS. Excellent quality and flawless functionality. The price & service cannot be beat. OUTSTANDING Was this review helpful to you?

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7.5 inch blackout July 20, 2015 : Mike D   this was just what I was wanting! fast shipping great buy, Thanks Was this review helpful to you?