What magnification range are you using?

[MachV]

Put a 4-16 Arken on the 20"BCA barreled AR, a lot heavy but very effective. 4th shot out of this combo took out a prairie dog @ 525 yards.
The CZ American has a Vortex crossfire tacticle 3-12 on it. It works and is light but glass is iffy and clicks mushy