You tube video Peep / aperture sight still a great option

[mubhaur]

https://youtu.be/aZGjOxzuuOo

I hope this video on peep sight will be helpful for many airgunners.

Regards, 

Bhaur

 

[crazyhorse]

Glad you mentioned "sight radius" as that is an important feature to learn. Longer is better.