7.5" 5.56 NATO Polygonal Barrel

13.7" .223 Wylde Spiral Fluted Barrel 1:8

16" 5.56 NATO Spiral Fluted Barrel 1:8 TiN Barrel Extension

10.3" 5.56 MK18 Nitride Barrel w/NP3 Barrel Extension

7.5" 5.56 NATO Spiral Fluted Barrel w/NP3 Barrel Extension Nitride 1:8

16" .223 Wylde Dissipator Barrel w/NP3 barrel extension 1:8

16" .223 Wylde Dissipator Barrel w/TiN barrel extension 1:7

10.3" 5.56 Cold Hammer Forged MK18 Barrel 1:7

20" 5.56 Cold Hammer Forged Spiral Fluted Barrel 1:7 TiN Barrel Extension(Sale)

16" 7.62x51 NATO 1:10 Twist Barrel

14.7" 5.56 NATO Stainless Steel Barrel Polygonal 3 groove 1:8 twist