These are the individual axles from the Lone Star Racing suspension kits.
Measurements: MTS +3 Axle Lengths Front Axles = 21.65" Front Axles (Gen 2) = 21.875" Rear Axles = 20.06"
XTR +5 Axle Lengths Front Axles = 23.65" Front Axles (Gen 2) = 23.875" Rear Axles = 22.06"
Gen 2 Axles are noted by the C/V boot. On the wheel side the Gen 2 boot has six small ribs of rubber. The Gen 1 only has three. These axle do have a different spline count so it is important to check before ordering.