Return to 8.0" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE SQUADRON 9.87" LIGHTWEIGHT QUAD RAIL

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0 of 0 people found the following review helpful:

Great upper July 17, 2025 : from Burgaw, NC United States   No flaws and works perfectly. Was this review helpful to you?

0 of 0 people found the following review helpful:

Top quality build November 19, 2023 : Sterling Deslatte from Austin, TX United States   The quality and finish of the 300 blk upper I purchased are top notch. Just shot it today for the first time I will only be buying uppers with Mas logo on them from here on out. Was this review helpful to you?

0 of 0 people found the following review helpful:

300 blackout September 14, 2023 : Darryl Barnhart from Swartz Creek, MI United States   I received my SBR very quickly after I built it on line to my specs. I will be shopping for more masdefense products in the future. I haven’t got my tax stamp yet so I am unable to shoot it. Will keep you posted when I’m able to fire it. Thank you masdefense. Was this review helpful to you?

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Upper February 25, 2023 : Ronnie Lantz   Awesome product Was this review helpful to you?

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Excellent February 18, 2023 : from Springhill , FL United States   This is one of the best companies to get products from quality and excellent customer service,ships fast definitely recommend them. Was this review helpful to you?

0 of 0 people found the following review helpful:

Excellent quality January 8, 2023 : Trenton Shaffer from Coolidge, AZ United States   The quality of this upper is outstanding! As advertised. Premium quality! I will continue to be a customer for years to come! Was this review helpful to you?

0 of 0 people found the following review helpful:

Ordered complete upper! December 28, 2022 : Joshua L. from China, ME United States   Ordered a complete upper in 300 Blackout. The build was very nicely put together, they used blue loctite on the handrail which was awesome,price was unbeatable, and shipping was super fast. Could not be more pleased. Was this review helpful to you?

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Excellent October 22, 2022 : Tyler Garza from Victoria , TX United States   Fast Shipping / Quality Product / Highly Recommended Was this review helpful to you?

0 of 0 people found the following review helpful:

Great service MAS Defense October 12, 2022 : Mark Lefevre from Snowflake, AZ United States   MAS Defense went well above my expectations from the prompt emails back from my questions to even giving me a call when I still had a few other questions before placing order. Then my order placed with it being shipped out the same day had me floored. Soon as my 300 blackout upper arrived I had to check it out with everything looking perfect. Now I’m looking to put together an AR10 and this will be my place to come back to make another purchase. Was this review helpful to you?

0 of 0 people found the following review helpful:

300 blkout June 7, 2021 : from , florida   Quick delivery and good quality Was this review helpful to you?