FN has made some FAL's with real bling.

Most of them wound up in the Middle East.

Churchill received a very nice engraved FAL when he retired.

Winchester has a very long history of finely engraved lever action rifles like the one of one hundred and one of one thousand.

Some big game hunters use highly engraved bolt action rifles.

Sporting shotguns often have engravings, gold trim and finely crafted wood.

Then there is Mall Ninja bling, an AR with everything "tactical insert part name here".