The Primary Arms Advanced Micro isn't the new hotness, nor does it have a 30mm tube, but it's reliable and rugged for its price. I have personally observed a battery life of more than a year with the dot set to a level that's readily visible.
https://www.primaryarms.com/primary-...-red-dot-sight ( @
Tom_Jones , if you want to edit my link so you get paid for the clicks, please do so. I'm not sure how.)
I have not personally run the Advanced Micro hard, but the one we have has been on 22 lr, 5.56 and 308 ARs and has held up. I personally know of one person who has been running the push button version for about three years. He shoots it frequently and the rifle it's mounted on is used as a loaner to any of his students who needs it. He's never had a problem with it. Downside is optical quality. It's good, but not Aimpoint good. It also has more lens flare than an Aimpoint when the sun is at certain angles. Overall, I'm pleased with the Advanced Micro and surprised at it's performance for the price point.
For the use you describe, I would not hesitate to buy a Primary Arms Advanced Micro. However, I would not consider it as an economical alternative for anything I specifically want Aimpoint quality for.