5.56x45mm NATO Barrels

16" AR 15 CA Compliant Mid Length Upper Assembly

20 5.56 Chrome-Lined Lightweight Contour 1:9 Rifle Length Barrel w/ FSB Pho

20" 5.56 Gov / SOCOM M-LOK Upper Assembly

16 5.56 Heavy Contour 1:7 Carbine Barrel w/ FSB - Phosphate

20" 5.56 Lightweight Contour 1:9 Rifle Length Barrel w/FSB

16" 5.56 NATO SOCOM Barrel (Black Nitride)

10.5" 416R Stainless Steel M4 Contour Barrel, 5.56 NATO, Carbine Length Gas

16" 5.56 Parkerized 1:9 Twist Carbine Length Barrel

Fortis Switch 556 Rail System - Barrel Nut

Ballistic Advantage 16" 5.56 1:7 Carbine Length Chrome/Phosphate Barrel

Stag Arms 18" 5.56 NATO SPR Fluted Stainless Steel Rifle Length AR-15 Barrel Premium Series 1:8 Twist

Stag Arms 20" 5.56 Chrome-Lined/Phosphate HBAR 1:7 Rifle Length Barrel w/ FSB

Aero Precision 12.5" 5.56 Cold Hammer Forged Midlength 1:7 AR-15 Barrel

One Horse 7.5" 5.56 SOCOM Pistol 1:7 M-LOK Complete Upper

One Horse 10.5" 5.56 SOCOM Carbine 1:7 M-LOK Complete Upper

One Horse 16" 5.56 SOCOM Midlength 1:8 M-LOK Complete Upper

Ballistic Advantage 16" 5.56 Government Profile Midlength AR-15 Barrel Modern Series w/ FSB Circular Handguard Cap

Aero Precision 16" 5.56 Government Profile Midlength AR-15 Barrel

10.3" 5.56 NATO 4150 CrMoV Carbine Government 1:7 Nitride Barrel

16" 5.56 Phosphate Midlength M-LOK Lightweight Complete Upper

16" 5.56 NATO 1:9 Twist Phosphate Midlength Lightweight Barrel

16" 5.56 NATO 1:7 Twist Phosphate + Chrome-Lined Midlength Heavy Barrel

16" 5.56 NATO 1:9 Twist Phosphate Midlength Heavy Barrel

16" 5.56 NATO 1:7 Twist Phosphate Carbine Heavy Barrel