All Average Craftsmanship or better melee weapons (except
for gauntlet, unarmed, shields, and whips) and spears,
throwing axes/hammers, throwing daggers/stars, arrows,
and bolts can be plated with silver. A Character that has
a one ingot of silver (25 s) can do the work by making a
Challenging (–10%) Trade (Weaponsmith) Test. When
silvering a two-handed weapon, the Character needs two
silver ingots. One ingot is enough to silver five arrows
or bolts. To purchase a silvered weapon outright, double
the weapon’s price or increase the weapon’s price by 2 gc,
whichever is greater. These are approximations and a GM is
encouraged to modify the pricing as suits the circumstances.
These weapons retain their silver plating for 1d10+5 successful
attacks. After this time, enough silver has worn away as to
remove any special advantages such weapons might afford.

Weapons fashioned from solid silver never lose their efficacy;
however, silver is an inappropriate metal for weaponry.
Generally, all weapons that can take silver plating can also be
fashioned from solid silver. These weapons cost the same as Best
Craftsmanship weapons. A Character wishing to forge a silver
weapon must supply half the cost of the weapon in materials and
succeed on a Challenging (–10%) Trade (Weaponsmith) Test.
When used in combat, a solid silver weapon imposes a
–10% penalty to Weapon Skill or Ballistic Skill Tests. On a
successful parry with this weapon, the wielder must also make
a Challenging (–10%) Agility Test or the weapon breaks. In
addition, on any attack roll of 96–99, the weapon becomes
blunted, reducing the damage it deals by 2 until a Trade
(Weaponsmith) Test is made. On a test roll of 00, the weapon
snaps and becomes useless.

NDM

If we want to use those rules

So Silver arrows would be in our price point, good luck getting any real weapon in silver bigger than a dagger though

Would Cassian's axe work?