ok, i have traded a xd 45 gap for a glock 17, 2nd gen?. the kid that i traded said it had never been fired. when i got home, i immediately took it apart to clean it. i noticed that the factory lube was still in place. so it lead me to believe that it really hasnt been fired. the gun is in immaculant condition, paper work had a print date saying it was 1991 when the manual was printed. if this is a 19 year old gun, ill never bug anything else but a glock for a hand gun ever. it lloks brand new. so how do i tell what year it was made? im not even sure its a 2nd gen, how can i tell? the numbers on the barrel and slide and frame are all matching. AXB368. CAN ANY MAGAZINES MAD BY GLOCK FOR 9MM FIT IN IT? can i inter change parts from newer 17's? sorry for all the newb ?'s but i dont know shyt about this gun, but i do know it fires great. i want to get different sights though. any info will be much appreciated.