The ultimate low-cost training solution for military and law enforcement built on the infamous Ruger 10-22 that mimics all the features of the standard M4 while utilizing lower cost 22LR ammunition. The T-22 Chassis adds a pistol grip, adjustable stock, free floats the barrel and also includes legendary Troy™ spring loaded Battlesights. T-22 Chassis System is compatible with all standard and bull barrels.