Devo not spoken but known - Leupold D-EVO 6x20mm Tactical Rifle Scope

The one feature that no-one comments on from the lack of experience is the thermal mirage factor that happens during a real bang bang fight about 75 hot rounds in. Three seconds wasted could cost you your bro life especially if you're supposed to his back. The DEVO takes you around mirage of the heated barrel. The red dot will get you started but DEVO keeps you in the fight until barrel cools down enough to re acquire/re engage objective. Keep your eyes on target, you can't fight what you can't see.
USMC retired