Quilted, with some very minor birds eye. I grew up using quilted maple a LOT in the Pacific NW. It has the potential to make a phenomenal stock, but you need to be very careful working it. Tends to chip out, tear and/or have soft pockets. Think burl.
If that was mine, would saturate it it with a 2 part marine grade wood hardener. As in a super thin epoxy designed to preserve and strengthen boat ribs.
The off topic in the pic should give you a decent idea of the wood’s potential…