The red tone doesn't match the one Jacob is using for Fakku!, that's my main qualm about the look. If you need them here are the RGB units and hex code for the proper colour.
Hex: #9D0A0A
RGB: 157, 10, 10
Personally I think it would look better if this rendition of the logo was used, perhaps engraved into the gun rather than using the little metal piece that seems to be bolted on.
It's a cool idea none the less, good luck!