Not even functional - Geissele USASOC AR15/M4/M16 Upper Receiver Complete Group

I ordered this thinking it’s Geissele, and socom selected it, so it must be one of the best. Received the upper, looked beautiful, kitted it out, went to zero and instant failure. Apparently Geissele does not know how to make barrels to spec, no 5.56 or .223 ammo fits in the chamber. Managed to finally get one chambered after significant force, took several mortar attempts and a rubber mallet to get the live round out. This has apparently been a persistent problem due to terrible QC. Will hopefully be sending back to Geissele via RMA. As much as I love their triggers and buffer system, this has permanently left a sour taste in my mouth, and I will never buy their products again. No wonder socom is using DD barrels, and we should too… or BCM, LMT, KAC, SOLGW or any other company that makes sure their barrels are to spec before sending them out to consumers. DO NOT BUY. (No fault of Optics Planet, love their store, fast shipping, excellent costumer service)