OK, so on April 1st 2017 I got a Tippmann M16 Upgrade at Delta Force Hinton-In-The-Hedges for my 20th. It was the day after my 20th but it was still a present, and here's the thing, I still don't know how to work the scope. Because the CO2 Tank was blocking my head. The website says it has an adjustable scope, is this true? That I can adjust the Scope using a rail mount?