Energized attacks will not trigger all three energizingitems — Kircheis Shard, Rapid Firecannon and Statikk Shiv in the same way; the highest instance of damage will apply to the primary target, and Statikk Shiv will chain to nearby enemies even if attacking a structure, due to Rapid Firecannon allowing it to trigger on structures. Kircheis Shard will not apply any damage, due to having the lowest damage of all three items.
The minimum attack range required for the +150 range cap is 428.57; however, due to the attack range values from champions, the closest is 430 (With Gnar'sRage Gene at level 6).
The lowest base movement speed in the game is 325. At this speed, Rapid Firecannon grants 16.25 movement speed.
The movement speed stat only increases flat movement speed, and will not interact with other percentage increases.
Passive - Energize: Moving and using basic attacks Energize you. When fully Energized, gain Firecannon.
Unique passive - Firecannon: Your next basic attack gains 35% increased range, up to a maximum of +150 range and deals 50-200 (based on champion level) bonus on-hit magic damage. Firecannon can be used on structures.