Rummbolt talks about the T-Eagle ER 4-16X44 SFIR scope for use on airsoft guns that has its own spirit level... "This airsoft scope is the first optic I ever used which has a built-in bubble level, so you are able to have both your reticle and the bubble in your field of vision while aiming. It is called the 'T-Eagle-ER 4-16X44 SFIR' and could be a nice tool for Airsoft Sniper and DMR players. Let´s take a look on what´s inside the box together!