Aero Precision AR-15 Mil-Spec Carbine Receiver Extension - Black Anodize - Open Box

UTG Pro TLU001KIT Receiver Extension Kit Mil-Spec AR-15 6 position Black Hardcoat Anodized Aluminum, Rifle

Aero Precision Stripped AR-15 Upper Receiver - Open Box

Aero Precision AR-15 Stripped Upper Receiver - Slick Side - Black

Aero Precision Complete AR-15 Upper Receiver Parts Kit - Open Box

Expo Arms 16" 5.56 NATO AR-15 Barreled Upper Receiver - 15" M-LOK Handguard - A2 Flash Hider - Open Box

Aero Precision AR15 Stripped LH Upper Receiver - FDE - BLEM

Expo Arms Billet PCC Slick Side Stripped AR9 Upper Receiver - Open Box