There are many sight choices on the market today. There are simple peep sights, night sights alleviated with luminant compounds, lasers (both green and red), scopes or magnifying sights, and red dot holographic sights.
The red dot sights are a fast way to place the barrel on target in many cases. The sight has a lens on which is projected a red dot or cross hairs. If it is effectively sighted, the red dot on target permits you to put rounds on target extremely quickly. It does not change for clearness and has very minor wind and elevation adjustment.
Many of these sights have adjustments for strength and permit you to adjust the time the sight is active to save battery life. That is a signal for me to remind you that anything you take into the field that takes batteries, can and will fail at some time. Having spare batteries can be a pain, but definitely beats having your brand-new red dot sight not available.
Holographic sights are easily available from discount rate distributors and are simple to install on a gun with a picitanny rail system. If your weapon does not have a rail system, adaptors are offered either to change the scope for your rifle or to install on top of the receiver.
You get what you spend for, however spend a little time comparing the features and abilities. There is no need to spend $500 on a brand-new system that is night vision suitable if you do not hunt at night. A number of the designs look the same, however the controls and battery compartment are in various places. Planning to find one that will work for you.
You need to spend a little time at the variety to make sure you and the rifle are lined up. You have to sight your new system and you need to practice so that it does not shock you when you need it during a hunt.