1 × NBS Mil-Spec M4 Carbine Stock; 1 × Discount Mil-Spec Carbine Buffer / Receiver Extension Kit

1 × B5 Systems BRAVO Black Mil-Spec Stock – OEM; 1 × B5 Systems P-Grip 23 Black – OEM; 1 × Discount Mil-Spec Carbine Buffer / Receiver Extension Kit; 1 × ODIN Works Complete Lower Parts Kit

1 × MFT BATTLELINK Minimalist Stock – Mil Spec – Black; 1 × Discount Mil-Spec Carbine Buffer / Receiver Extension Kit; 1 × ODIN Works Complete Lower Parts Kit