This is now my fourth barreled upper from MAS and couldn't be happier. I have purchased .223, 300blk, 9mm, and now this .308. What they offer for price, quality, and options you can not find a better deal. I like the fact the give you so many drop down options so you can truly get the build your going for. Couple that with using aero precision parts and this is the best. I like the fact that they build it and test fire it and check for headspacing to insure your getting a great piece of kit. Not that I need any more uppers at this moment, but if I did l, I would be back for sure. I've turned my father and younger brother onto MAS and they are just as satisfied.
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These guys are great
July 8, 2022
:
Russell Choy from Oak Hills, CA United States
Got every thing I ordered together and well packed. I even got a call from them to verbally check shipping address and told me it's on the way....will be definitely using them again
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A great setup everybody should have
June 26, 2022
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Jack. F from USA
I chose this as nobody seems to offer a 22-24" .308 barrel, but I can't say its any real issue with 20".
Solid construction and assembly, the packaging was thorough. I'd recommend to anybody looking to do long-range precision shooting.
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Top notch in every aspect
June 17, 2022
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Adam Roberts from Canyon Country, CA United States
Theses guys get a 10/10 in every category Online ordering was simple and easy to understand the available options for the upper. After order, the communication was prompt and ensured I would recieve the upper exactly the way I wanted. Shipping was was incredibly fast, within 24hrs. Very impressive. The box and packaging was a bit of an overkill and arrived in perfect condition. Inspected the upper when I recieved it, excellent quality build is my impression. The muzzle brake was installed dead nuts perfect at top dead center without using a bunch of tacky shims or spacers. I was so impressed with the quality, service, and low price I ordered a second upper a few days later. I'll update this review after I finish the build and see what type of groups this barrel will produce
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Aero precision upper
June 16, 2022
:
from CA United States
Rock star prices with super fast shipping will definitely recommend and continue to purchase from them
I keep coming back 
A great setup everybody should have 
