I have one new optic rail that replaces the factory FN sight and allow low mounting of an optic of your choice.
From Criitical Dimensions. A more advanced optic rail, this one is adjustable so you can zero the built in iron sights that are coated with something like super luminova so they glow in the dark.
$70.00 Shipped USPS Priority Mail
I have a plate that allows you to mount two side rails on either side of the PS90/P90.
$15.00 shipped Priority Mail
Two ring sight adjustment tools, fits in PS90/P90 butt stock, new - $15.00 each shipped
One Dual Magazine Clamp by MagazineParts.com, new.
$20.00 Shipped USPS Priority Mail
SOLD Two NIB factory FN P90 50 round magazines.
$50.00 each shipped USPS Priority Mail
SOLD
SOLD FN Factory Spare PS90 Bolt Assembly, brand new.
$150.00 Shipped Priority Mail SOLD
From Criitical Dimensions. A more advanced optic rail, this one is adjustable so you can zero the built in iron sights that are coated with something like super luminova so they glow in the dark.
$70.00 Shipped USPS Priority Mail

I have a plate that allows you to mount two side rails on either side of the PS90/P90.
$15.00 shipped Priority Mail
Two ring sight adjustment tools, fits in PS90/P90 butt stock, new - $15.00 each shipped
One Dual Magazine Clamp by MagazineParts.com, new.
$20.00 Shipped USPS Priority Mail
SOLD Two NIB factory FN P90 50 round magazines.
$50.00 each shipped USPS Priority Mail
SOLD
SOLD FN Factory Spare PS90 Bolt Assembly, brand new.
$150.00 Shipped Priority Mail SOLD