I have the more full bodied(older model) Eotech 557, so I do think that the field of view is significantly less pertaining to peripheral sight outside the optic. Inside the optic itself, the Aimpoint has a more narrow tunnel of sight, whereas the Eotech is more open, but you lose the peripheral with the Eotech. Hopefully that makes sense for you. I don't know how it would look w/ 3x magnifier, but the Eotech has a pretty significant increase. You are not going to shoot a target a mile away or anything, but it has it's advantages. I have not had any issue with my Aimpoint @ 100 yds, but I really have not pushed past that distance with it. I can hit 300 + meter target with iron sights no problem, so I would say it is possible with the my Aimpoint red dot.