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So there should also be rules for the use of that natural companion
of the sword, the shield.
Shields
are the oldest defensive technology of mankind. A shield is a
portable barrier, often strapped to the arm or carried by one hand.
It protects the bearer against attacks from the front.
Normally
you use a shield with a one-handed weapon (blade, club, handgun). If
the bearer wishes, he can fit his shield with a weapon rest so that
the shield supports long arms (spears, long guns). All attacks with
these weapons are at DM -2. Very high-tech shields may incorporate stabilization and anti-grav to negate this penalty. Imagine heavy weapons carried behind a gun shield!