The RAP4 XPower, the latest and the best training marker. The RAP4 XPower is identical to the legendary M4 rifle used by SWAT Teams, Special Operation Groups, and the U.S. Military. The M4 carbine, the U.S. Military's weapon of choice, is known for its solid construction, durability, and sustained reliability, and things are no different with the RAP4 XPower. This marker is designed to replicate the look, feel, and action of the real M4.
The Real Action Paintball RAP4 XPower (270-300fps recreational use) is newer, so it should be commonly available, both new and used.