The only Colt style scope I am aware of which is not cheapo/disposable after hard use, is the CMore mfg model made for a govt contract. Some extras hit the mkt a few years ago for about $150, and show on Equip Exchange occasionally. Memory says these had mounts included to flat tops, so they would go well on an ARMS carry handle to Weaver adaptor (another $60ish).

I am guessing that mount not included means you just get the tube.