AR Parts in 5.56x45mm NATO

LMT Defense 16" 5.56 Chrome-Lined 1:7 Twist Barreled Upper Receiver

16" 5.56 NATO 1:7 Twist Black Nitride Mid-Length Pencil Barrel

Ballistic Advantage 14.5" 5.56 Government Profile Midlength AR-15 Barrel Modern Series w/ FSB Triangle Handguard Cap and Delta Ring Assembly 1:7 Twist

NBS 16" Billet Slick Side 5.56 Parkerized Mid-Length 1:7 M-LOK Complete Upper

NBS 16" Billet Slick Side 5.56 Parkerized Mid-Length 1:7 M-LOK Complete Upper

Ballistic Advantage 14.5" 5.56 M4 Profile Carbine AR-15 Barrel w/ FSB Circular Cap and Delta Ring Assembly 1:7 Twist

16" 5.56 NATO 1:7 Twist HBAR Fluted Mid-Length Stainless Steel Barrel

LMT 10.5" 5.56 Chrome Lined 1:7 Barreled Upper Receiver

NBS 5 5.56 Micro 1:5 M-LOK Upper Assembly

NBS .223/5.56 Bolt Carrier Group - TiN

7.5" 5.56 NATO 1:7 Black Nitride Pistol Length Barrel

7.5" 5.56 NATO 1:7 Parkerized Pistol Length Barrel

16" 5.56 NATO 1:7 Twist Black Nitride Mid-Length Barrel

Microbest C158 HPT/MPI 5.56 Bolt Carrier Group - Black Nitride

Microbest C158 HPT/MPI 5.56 Bolt Carrier Group - Chrome

Microbest Mil-Spec C158 HPT/MPI 5.56 Bolt Carrier Group - Phosphate/Chrome-Lined

Aero Precision M4E1 Builder Set w/ 9.3" ATLAS S-ONE M-LOK Handguard - Multi Terrain Camo

Ballistic Advantage 14.5" 5.56 Government Profile Midlength AR-15 Barrel Modern Series w/ FSB Circular Handguard Cap and Delta Ring Assembly 1:7 Twist

16" 5.56 NATO 1:7 Twist Mid-Length Parkerized Barrel

14.5" 5.56 NATO 1:7 Twist Black Nitride Mid-Length Barrel

Aero Precision M4E1 Upper Receiver and 12" M-LOK Gen 2 Handguard Combo - FDE Cerakote

Aero Precision M4E1 Upper Receiver and 9" M-LOK Gen 2 Handguard Combo - FDE Cerakote

LMT 5.56 Chrome Lined M4 AR-15 Barrel with A2 FSB - 14.5" 1:7 Twist

LMT 5.56 Chrome Lined M4 AR-15 Barrel with A2 FSB - 10.5" 1:7 Twist