Best bang for buck - Athlon Optics Helos BTR Gen II 2-12x42mm 30mm Tube Rifle Scope, First Focal Plane

So the glass clarity falls off around 800 ish or if you have bad lighting but for the money it provides an excellent picture and usability for a 5.56 long range rifle. Struggles at the 1000 a bit but at that range it’s not generally the thing that makes you miss.