I'm going to be building my mom an AR15 carbine soon. Yeah, thats right...don't mess with Texas women! Anyway, she loves my Eotech and wants something like it, but she doesn't want to pay the $500 they're going for now. She's not going to any carbine classes or three gun matches soon, so its doesn't have to be uber tactical. I'm just looking for a good red dot or holographic sight for around $150. Any suggestions? Experience is appreciated. Thanks.