Proven limb driven system (same reliable torsion spring system since inception).Adjustable spring tension.Free-floating head. Full capture carbon core containment cage (rubber overmolded)Side-load arrow gate. All machined aluminum/brass. NO plastic. NEW Micro Adjust windage/elevation. NEW Top OR bottom limb operation. NEW built-in bubble level for quicker/easier setup. NEW sleeker design. NEW increased strength. Lightweight (under 3.5 oz)