LWRCI RIFLE PRIOR TO READING THIS MANUAL This manual contains. 7.62mm Rapid Engagement Precision Rifle (R.E.P.R. the feel and muscle. In LWRC International's family of M6 short-stroke, gas-piston operated rifles and carbines. DO NOT OPERATE ANY LWRCI RIFLE PRIOR TO READING THIS MANUAL. discharge or selecting an unintended setting due to muscle memory.