Nice to see Shogun getting some attention, That's a fairly low end model looking at it & given that & the fact it has V brakes I'd date it somewhere around 98-99ish but not 100% sure. Have you looked at the frame number (usually under the bottom bracket) as that might provide a clue.
Shogun made some really decent riding bikes for the price, the quality & finish of the frame/forks were a strong point IMO. Looks to be in nice shape too, what's your plans for it?