Anti-Armor Rifle

Design of a 20mm Anti-armor (anti-tank/anti-materiel) Rifle.

Bullets usable: (in order from top to bottom of image)
Standard 20mm
HEAT
Tracer
Cluster Explosive/ Anti-personel spread
Incendiary
Smoke
Flare/Illumination

Others (not depicted)
Flechette Discarding Sabot
FlaK style

Can be loaded/fired using:
Bolt-action
Breachfeed (side)
Magazine
Belt

Weapon parts Courtesy of: [link]
and Photoshop CS4

I realize the realism of this is less than exact, xP
Its not designed to be realistic, for the record.