Description

5.5 inch 9mm AR15 fully QpQ nitrided 1/10 twist * 9MM Chamber * Hbar contour * 1/10 twist rate- which is the best for the 9mm platform in the AR -does not use any gas blocks or has any gas holes or indexing pin * 1/2×36 Threaded * M4 feedramps * Made from 4150V barrel blanks from ER Shaw * Black Nitride QPQ on the outside and inside * Button Rifled please take a look at the BCG for the 9mm which is needed for this platform set up. if you have any questions about setting up a 9mm upper please contact us.