.223/5.56

Aero Precision

Aero Precision M4E1 16" Carbine-Length /Atlas R ONE handguard CALIFORNIA LEGAL - .223/5.56

Stag Arms

Stag Arms Stag 15 16in COMPLETE Tactical Upper CALIFORNIA LEGAL - .223/5.56

Colt's Manufacturing Co.

PSA Complete M4 Upper W/MBUS REAR CALIFORNIA LEGAL - .223/5.56 - FDE

Palmetto State Armory

Palmetto State Armory Rifle Kit M4 Carbine Classic CALIFORNIA LEGAL - .223/5.56

Palmetto State Armory

Palmetto State Armory Rifle Kit 16" Mid-Length CALIFORNIA LEGAL - .223/5.56

Colt's Manufacturing Co.

Colt Complete M4 Upper CALIFORNIA LEGAL - .223/5.56

Stag Arms

Stag Arms Stag15 16 in Tactical Upper CALIFORNIA LEGAL - .223/5.56

Palmetto State Armory

Palmetto State Armory Rifle Kit 16" Mid-Length Magpul MOE/EPT CALIFORNIA LEGAL - .223/5.56

Palmetto State Armory

PSA Rifle Kit 16in Mid Length Magpul MOE CALIFORNIA LEGAL - .223/5.56

Radical Firearms

Radical Arms Complete Upper 16in SOCOM CALIFORNIA LEGAL - .223/5.56

Palmetto State Armory

PSA Rifle Kit 16in/Carbine Lightweight Magpul MOE/EPT CALIFORNIA LEGAL - 5.56

Palmetto State Armory

PSA Rifle Kit 16in/MidLength Lightweight Magpul MOE/EPT CALIFORNIA LEGAL - 5.56