Refund

I've heard rumors about refund regarding ZP purchases and I was wondering if it applies to BP purchases..

My case : I have a M4-C and my friend told me getting the silver was worth it even though you had the custom. So I bought it and eh I'm kinda disapointed by its stats/look/etc.

So I was wondering if I could get a BP refund.

Btw, I bought the gun like 5 hours ago.