I have an AimPoint Red Dot Comp C3 2MOA sight using a HHA Optimizer Plus mount (adjustable).
The AimPoint is parallax free, which means yiu never have to worry about centering the dot inside the sight. When the dot is on the target, so are you.
It also has a very long battery life (10,000 hr.).
The AimPoint Comp C3 2MOA is the sight AimPoint recommends for bow use and I had it on a .44 Mag. before trying it on my bow, it may never get back on the Mag.