Odin Works 6mm ARC AR-15 Barrel - DMR Profile - XL-Rifle Gas System with .750 Turnable Gas Block - 21"

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

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

Sons of Liberty Gun Works Precision SPR Barrel 6mm MAX 16", Black - Superior Quality - 16PRECISIONSPR-6MAX

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

FAXON Match-X Series 20in 6mm ARC Rifle-Length AR15 Barrel (15BARC75R20NTM-HL-5R-NP3)

Ballistic Advantage Premium Series, Barrel, 308 Winchester, 16 in, Hanson Profile, Mid Length Gas System, Fits AR10, QPQ Corrosion Resistant Finish, Black BABL308019P

FAXON Match Series 16in Gunner 6mm ARC Mid-Length Barrel (15BARC75M16NGQ-5R-NP3)