A new idea for a champ with a True Ammo Mechanism

I am thinking about an idea for a new champion which is like a veteran Demacian fighter who utilizes a piltoverian Assault rifle , His abilities may be as follows:

Passive : He uses an assault rifle with a magazine mechanism , 10 Bullets per magazine and having 3 magazines(Reloading when his magazine runs dry) , He restores 3 Bullets per minnion or monster and 10 bullets per kill and 6 per assist , Completely refills ammo at base.

Q : Switch between Semi-Automatic and Burst fire , Semi automatic is default dealing 70% of AD (Increasing to 120% Per rank of Q) , And burst fire that consumes 3x Ammo BUT deals 2x Damage.

W: A simple ability ,It gives a short burst of movement speed , Which is useful for kiting since he is an immobile marksman.

E: Passive: If he runs out of ammo , Automatically switches to a machete , Gaining Melee attacks and a new set of abilities, Active : (30 seconds cooldown) Switches to the machete manually.

R: Is a normal ability (Think Jayce's R or Nidalee's R) Which is automatically learned at level 1 , Only one point can be put in it , Reloads his rifle , Dealing 30% Increased damage for the first 3 shots , (3 Second cast time , Can't be activated unless below 5 bullets in current magazine)

Machete Form:

Q : Swipes in a cone infront of him , Dealing AOE dmg (Think Nidalee's E in Cougar form).

W : Empowers the next basic attack dealing alot of over-bleed damage (Acts as an autoattack reset , High cooldown)

E : Returns to Rifle form.

R : Lungs to a target enemy , Dealing 25% Max health damage , Plus 10% missing health damage as a bleed over 5 seconds (Increased by AD)

So , How do you think about it ?