MCR stands for Multi-Caliber-Rifle and it is built on the AR type design. MCR Semi-Automatic rifles come in four different models which interchange with each other from one series to the next. To change calibers for example from a .223 (MCR100) to .308 (MCR200) you simply change the upper receiver and magazine module.
MCR Series Rifle Specifications
DPMS 20rd magazine
Upper/Lower receivers and magazine module made out of T6-6061aircraft aluminum.
Semi-Automatic AR type gas operation.
Free floated Lothar Walther barrel available in different lenghts.
MIL STD-1913 rail machined on the upper receiver.
AR type pistol grip and butt stock.
AR type trigger group parts that interchange with standard AR's.
Rifle weight depending on calibers from 8 lbs to 16 lbs.
Rifle comes with standard hand guard, stock and grip