Ballistic Advantage Modern Series 13.7" 5.56 NATO Government 1:7 AR-15 Barrel - Mid-Length - 1/2x28

Ballistic Advantage Performance Barrel 5.56x45mm 13.70", Black - Compact and Efficient Barrel - BABL556036F

Faxon Firearms Mid-Length Button Rifled Gunner Barrel 5.56x45mm 16", Black

FN America AR-15 16" Barrel 556NATO 1:7 Twist Button Broached, Black - 20100039

FN America AR-15 16" Barrel 1:7 Twist Button Broached, Black - 20100046

BALLISTIC ADVANTAGE Premium Series 6MM ARC 16", 5/8x24, 1:7 Mid Length Gas Barrel for AR10

BALLISTIC ADVANTAGE Performance AR15 16in 5.56mm Mid-Length Barrel with Gas Block (BABL556013F)

BALLISTIC ADVANTAGE Performance AR15 16in 5.56mm Mid-Length Barrel with Gas Block (BABL556025F)