The bolt appears to be modified or damaged but it's an 870 or a clone.
Cannot imagine why you waste all the $$ refinishing a clone.
Grips and stocks come in 100 flavors.
Brownells and Midway both have 20 pages (literally) of stocks and grips.
Go with a nice set of SpeedFeed furnishings and you won't be disappointed.
I have picked up used furniture sets on GunBroker for as little as $20 for grip and stock.
See:
http://www.uer.ca/...d=1&threadid=71075