1x30 M2 Red Dot with Cantilever Mount - Black Color:Black You can skip the timing

You can skip the timing procedure if (and only if) you screw the muzzle brake all the way onto the outer barrel thread

Objective Lens Diameter : 24mm

and prone shooting

Clicker ball plunger grub screw for hop click adjustment

1x30 M2 Red Dot with Cantilever Mount - Black Color:Black You can skip the timingAIM O's M2 Red dot sight, A modern classic in the Airsoft world. One of the earliest styles of red dot scopes in Airsoft, the M2 pattern is a military styled scope with simplistic operation. Windage and elevation adjustable dot reticle with 5 levels of brightness. It drops right on to an accessory rail with a simple screw type rail attachment bracket.