I do believe this is a 2000 possibly a 99 but i doubt it. If you are looking into a pump you have a nice set of pneumatics on the front which i almost wouldn't change IMO, on the topic of a pump kit you can go with a cheapy for around 30 dollars, however i recommend a CCM pump kit they are of the highest quality and pump is what they do. As far as the different kits there are they these kits
Economy Pump Kit: which is the basics at the lowest price around 45 bucks
Lightweight Pump Kit: which is almost the same as the economy (i own two of these) they're quite enough bang for your buck at 50 dollars
Deluxe Pump Kit : (their regular pump kit) With three rods for support this is the best pump kit on the market IMO(in my opinion) i have owned several of these on several different guns they have no wiggle or play in the pump handle.\
You will have to order a pump kit according to the year of the gun CCM bases on eBay so you will find their products there.
HOPE I HELPED