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Steven J Martinez from Cheyenne, WY United States
I already have their 16-inch 300 blackout upper, and I decided to get a 6-inch just for the heck of it, and man, was I surprised how well this thing performed. Much more accurate than I expected a 6-inch barreled upper to be. The quick shipping was nice, and the price is always great with this company, especially for the quality of fit and finish for their products.
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0 of 0 people found the following review helpful:
Really nice build
May 6, 2022
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Joe from , IL United States
Hand guard is what sells this great contour for your hand to have a natural shelf. Really makes for a solid tub or tob grip.
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0 of 0 people found the following review helpful:
Top notch quality!
April 30, 2022
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Roger Workman from Mint hill , NC United States
Could not be more satisfied with their craftsmanship and their attention to detail!
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0 of 0 people found the following review helpful:
Lets Go Brandon
November 11, 2021
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Justin Jones from McDonough, GA United States
Once again another amazing product from these guys at an even better price. Quality is top notch and functionality is always 100%
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1 of 1 people found the following review helpful:
Quality&affordable
May 17, 2021
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Jacob from Midlothian, VA United States
Got the bcg and charging handle to go with it. Looks really slick. Came in perfect no blems. Everything torqued to spec. Gonna be interested to see if itll run some 220 grain subsonic without messing with my buffer. Running standard h2 right now. Just going to be checking reliability for heavier loads because i do want to shoot subs suppressed and unsuppressed. If you are tired of psa and the normal companies. Definitely ORDER FROM HERE!!!!!!!! Update 5/16/21 doesnt cycle subsonic. Anything over 160 grain is a no go. ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- MAS Defense Reply: Jacob, I would try using a standard 3oz carbine buffer or a custom lighter weight one. That should work when firing suppressed. If it does not, you may have to open the gas port in the barrel little by little. The problem is 300 BLK needs 9" of barrel length to complete the entire burn. Reducing the barrel by 1/3 creates less back pressure which is used to move the BCG and buffer. A larger gas port will allow more gas to flow through the gas system to move the components. If you switch to firing supers again you can swap the buffer to a H1 or H2 to absorb the additional back pressure. Thank you for your business and your feedback!
Exceeded my expectations 
Really nice build 
