Millennium : Features Include: TURBO VALVE ,FIELD STRIP BOLT ,EXPANSION CHAMBER ,METAL BALL DETENT ,VERTICAL FEED PORT ,CUSTOM MILLED BODY ,CYCLONE BOLT INSERT ,THUMB VELOCITY ADJUSTER ,PORTED LONG SHOT BARREL ,45 GRIP WITH FINGER GROOVES ,LOW PRESSURE VACUUM CHAMBER. A Great Gun it looks so much like a Spyder though, it scares me.

Defient: Features Include: Inline regulator ,Quick release bolt ,Different size barrells ,Custom milling ,Double trigger ,Alluminum grip ,Alluminum body ,Vertical feed ,Special splash anodize ,Short and long barrel attchments ,Ball sizers ,3 shot, 6 shot, and full auto ,13 balls a second ,Fore grip ,Low-pressure operation (225-250 psi) ,Length with out the barrel 7.5" !!! And it comes in ALLOT of colors !!!