Ive got a sparc and a strikefire. For a rifle go with the strikefire. Easier to find the dot and you get a no poi shift change as needed red or green dot. Comes with 3 mounting options.
Sparc is lighter smaller dot but its harder to pick up in very bright daylight. Works good on a plinking handgun i like using it on my ruger mk3 22/45. Comes with almost as many extras as the strikefire.
Ive used both on my 458wimmag for 40 510grain loads at 2100fps and neither lost zero. Damn tough optics. Ive destroyed a nikon african monarch scope and its knocked the xhairs loose on a leupold vx7 with that rifle.
My vote on your application is the strikefire
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith
The problem with being stupid is you cannot simply decide to stop doing dumb things...
"I crapped my pants to avoid the draft!!" -Ted Nugent