5.56x45mm NATO Receiver Parts

G36 Well, Magazine, G36 5.56mm - Well, Magazine, G36 5.56mm

M4 5.56 Complete Monolithic Upper Receiver Groups - M4 Le6944 Upper Group 14.5in Stripped

M4 5.56 Complete Monolithic Upper Receiver Groups - M4 Le6943 Upper Group 11.5in Stripped

M4 5.56 Complete Monolithic Upper Receiver Groups - M4 Le6945 Upper Group 10.3in Stripped

Ar-15 Enhanced Combat Button Mag Releases - Ecb Enhanced Combat Button Slant Black

Brn-4 Assembled Upper Receivers - Brn-4 Assembled Upper Receiver 16'''' Heavy Barrel Black

Brn-4 Assembled Upper Receivers - Brn-4 Assembled Upper Receiver 10.4'''' Heavy Barrel Black

Brn-4 Assembled Upper Receivers - Brn-4 Assembled Upper Receiver 16'''' Medium Barrel Black

Brn-4 Assembled Upper Receivers - Brn-4 Assembled Upper Receiver 10.4'''' Medium Barrel Black

Brn-15A(R) M4 Stripped Upper Receiver - Brn-15 M4 Upper Receiver, Black

Ar-15 Lower Parts Kit 5.56 - Ar-15 Lower Parts Kit 5.56 No Fire Control Grp/Pistol Grip

Ar-15 Upper Receiver Completion Kits - Brn M16a2 Upper Receiver Completion Kit

Brn-15 11.5'''' Upper Receiver Assembly 5.56mm - Brn-15 5.56 11.5'''' Bbl .750'''' Gb Upper W/Charging Handle & Bcg

Brn-15 13.7'''' Upper Receiver Assembly 5.56mm - Brn-15 5.56 13.7'''' Bbl .750'''' Gb Upper W/Charging Handle & Bcg

Ar-15 16'''' Upper Receiver Assemblies 5.56mm - Brn-15 5.56mm 16'''' Bbl .625'''' Gb Upper W/Charging Handle & Bcg

Ar-15 16'''' Upper Receiver Assemblies 5.56mm - Brn-15 5.56mm 16'''' Bbl .750'''' Gb Upper W/Charging Handle & Bcg

Ar-15/M16 M16a2 Stripped Upper Receiver - Brn Ar-15/M16a2 Stripped Upper Receiver, 5.56 Nato, Black

Hk53 Guide Rod, Imcompl Hk53 - Guide Rod, Imcompl Hk53

Mk18 Block Ii Tribute Bundle

Brn-4(R) Blem Upper Receiver Assemblies With Nitride Barrels - Blem Brn-4 Assembled Upper 14.5 Md Black Nitride Bbl

Lightweight Ar-15 Starter Kits - Lightweight Ar15 Starter Kit 10.5'''' Handguard 12.5'''' Bbl W/Bcg

Lightweight Ar-15 Starter Kits - Lightweight Ar15 Starter Kit 10.5'''' Handguard 11.5'''' Bbl W/Bcg

Lightweight Ar-15 Starter Kits - Lightweight Ar15 Starter Kit 14'''' Handguard 14.7'''' Bbl W/Bcg

Brn-4 Upper Receiver Build Kits - Brn-4 Upper Receiver Build Kit, 16'''' Heavy Barrel