1 × NBS Mil-Spec M4 Carbine Stock; 1 × Discount Mil-Spec Carbine Buffer / Receiver Extension Kit; 1 × OEM Mil-Spec AR-15 Lower Parts Kit

1 × Trinity Force AR-15 Lower Vice Block; 1 × Trinity Force AR-15 Upper Vice Block

1 × Discount Mil-Spec Carbine Buffer / Receiver Extension Kit; 1 × Omega Stock – Black

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

1 × MFT BATTLELINK Minimalist Stock – Mil Spec – Black; 1 × Discount Mil-Spec Carbine Buffer / Receiver Extension Kit

1 × B5 Systems Enhanced SOPMOD Mil-Spec Stock – Black – OEM; 1 × Discount Mil-Spec Carbine Buffer / Receiver Extension Kit