Great optic is these are the specs and budget you are looking for - Truglo Eminus 4-16x44mm MSR Illuminated Scope w/TacPlex Reticle

If you are looking for FFP, Japanese glass, or a zero-stop, look elsewhere - this does not have those features. If you are looking for a budget optic for a varmint/target AR build, this is the best there is for $300. I have this on my AR15 and my buddy had this on a 6.5 Creedmoor RPR that we were able to take out to 1000 yards on a 12 in steel plate. Not positive, but this scope is likely just a Vortex Strike eagle at a slightly better price.