The M24 is not discontinued, as CA currently offers two versions, the military or SOCOM type and civilian type. They are available in the US from a few retailers. Although I have sold two of them in the past, I have no personal experience with them and so can not remark on quality, etc.
http://www.classicarmy.com/product_i...roducts_id=173
http://www.classicarmy.com/product_i...roducts_id=174
Some marketing data on them:
Classic Army M24 Socom Sniper "Civilian Type"
THE LATEST GENERATION M24 SOCOM
SNIPER FROM CLASSIC ARMY NOW
SHOOTS 440-460 FPS WITH 0.20G BBs!
NEW PACKAGING
SMOOTH BOLT ACTION
ONE-PIECE BARREL
POLYMER STOCK
ADJUSTABLE BUTT PLATE
ONE-PIECE CHAMBER
REINFORCED SAFETY SWITCH
ALUMINUM RECEIVER
ALUMINUM BARREL
BIPOD, SLING, AND SCOPE MOUNTS
WEIGHT 3.69KG
BARREL LENGTH 515MM
MAGAZINE CAPACITY 25RDS