Return to 14.5" 5.56 / .223 1x7 M4 CONTOUR 4150 CrMoV MELONITE NITRIDE BARREL
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5 of 5 Awesome product July 19, 2023
: Z. Taylor from Smithfield, NC United States  
Awesome product, great shipping, and awesome customer service. MAS DEFENSE is the gold standard for local companies trying to provide services to the masses!

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5 of 5 2nd build July 19, 2023
: Robin Dickinson from Clover, SC United States  
Heavy duty barrel.
Super fast shipping.

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5 of 5 March 11, 2022
: Jeffrey Barry from Raleigh, NC United States  


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5 of 5 Well Done June 17, 2019
: Richard Alvarez from Ewa Beach, HI United States  
Top quality with exceptional price. Thank you.

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5 of 5 Mas defense 14.5" January 29, 2018
: Kyle H  
I'm more than happy with this barrel. Rifling is very nice as well as the contour machining. Quality far exceeds the price!

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4 of 5 Beautiful September 2, 2017
: Stephen C  
If a barrel can be described this way. This is the second barrel I have purchased from MASS. The first was for a .300 build and I couldn't be happier. It is a tack driver at 100yds even with Sub-sonic rounds. Expect the same from this barrel.

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5 of 5 Very Nice February 7, 2016
: Michael M  
Nice barrel. Just as advertised.

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