Hey Hammer,
Here's a couple of questions for you as you create your character:
1) Are you still going with the Insubstantial 4 [Incorporeal] power? If so, do you want to be able to use your weapons while Incorporeal?
2) I think your "costume" is a good one. I think you might be able to make some, if not all, your weapons Alternative Effects to your Silver Pistols... Not sure what I'd call it... maybe, Silver Weapons? Or Weapons' Belt?
It would qualify as a "Device", so:
Device: Silver Weapons array (max 12 points to spent on each effect)
* Silver Pistols - Blast 4 with Multi-targeting extra [cost 12 pp]
* Alternative Effect: Silver Knife - Strike 6 with Penetrating 6 extra [cost 1 pp]
* Alternative Effect: Silver Knuckledusters - Strike 6 with Penetrating 6 extra [cost 1 pp]
* Removable flaw [-1 pp / 5 pp of Device = 14/5 = -3]
* Total Cost for Silver Weapons = 11 pp
Your silver weapons only work against corporeal targets, and only when you are corporeal too. They can only be taken away when you are both stunned and defenseless. You can also use extra effort with your weapons.
If you want them to affect corporeal targets and incorporeal targets whether you are corporeal or not, you would need to apply the Affect Corporeal and Affect Incorporeal extras.
So...
Device: Silver Weapons array (max 18 points to spent on each effect)
* Silver Pistols - Blast 4 with Affect Corporeal 4, Affect Incorporeal 2, and Multi-targeting extras [costs 18 pp]
* Alternate Effect: Silver Knife - Strike 5 with Accurate 1, Affect Corporeal 5, Affect Incorporeal 2, Penetrating 5 extra [costs 1 pp]
* Alternate Effect: Silver Knuckledusters - Strike 5 with Accurate 1, Affect Corporeal 5, Affect Incorporeal 2, Penetrating 5 extra [costs 1 pp]
* Removable flaw [-1 pp / 5 pp of Device = 20/5 = -4]
* Total Cost for Silver Weapons = 16 pp
This would allow you to use your weapons against corporeal and incorporeal targets regardless of your form.
The damage effect is a little less on the knife and the knuckledusters, but you gain a +2 bonus to attack with them (thanks to the Accurate extra). You still need to keep within the Power Level limits, so with a damage effect of 5, your attack bonus cannot be more than +11 (including the bonus you gain from Accurate)
Alternatively, you may want to consider a different effect for your silver knuckledusters, seeing at the do basically the same thing as the knife... maybe an Affliction effect... like punching someone with your dusters dazes/stuns/incapacitates them out?
If you like that idea, the Alternative Effect would instead read:
* Alternative Effect: Silver Knuckledusters - Affliction 5 [Dazed/Stun/Incapacitate] with Accurate 1, Affect Corporeal 5, Affect Incorporeal 2, and Cumulative extras.
Could be fun!
Ayrn