Grunts - 50 PR Bronze/Spined
Grunts can only use the suit given to them by guild; no special clothing is allowed.

It is with the orc specialisations that the armours begin to differ.

Norviz Klompur - 55 PR Verite/Horned
Norviz Klompurs can only use Ringmail, Leather and Studded Leather. Armour must be mixed; no special clothing is allowed.

Aprentiz Shamun - 50 PR Horned
Aprentiz Shamuns can only use Leather; no special clothing is allowed.

Norviz Skowt - 50 PR Horned
Norviz Skowt can only use Leather; no special clothing is allowed.

Klompur - 65 PR Valorite/Barbed
Klompur can use whichever pieces they want,except plate tunic and leggings. Armour must be mixed; some special clothing is allowed.

Shamun - 55 PR Barbed
Shamuns can only use Leather; some special clothing is allowed.

Skowt - 55 PR Barbed
Skowts can only use Leather; some special clothing is allowed.

Tuff Klompur - Same as Bozz.
Klevur Shamun - Same as Bozz.
Sneeki Skowt - Same as Bozz.

The Bozz
The Bozz, and similar ranks, have no restrictions on anything - they each may choose freely.

Regarding Shields
All these numbers are without shields. Only Lil'wuns/Grunts aspiring to become Klompurs, and of course Klompurs themselves, can use shields.

Accepted Shields
Only wooden shields, tear kite shields, round metal shields, bronze shields and heater shields are allowed; and only regular wood and iron metal. Only when you are above Norviz Klompur may you use any kind of metal with your chosen shield.
If you want to play a Skowt who uses a shield you have to ask to do so in-game, and you might get your "corporate approval" *Grins*.