SIONICS WEAPON SYSTEMSTHE SIONICS PATROL SBRNOW AVAILABLESIONICS PARTNERED TRAINING COURSESSIERRA ELEMENTLEARN MOREREADY WHEN YOU ARE. CRAFTING PERFECTION THROUGH SIMPLICITY Shop the trusted Patrol Rifle ThreeFIREARMS Complete Upper Receiver Assembly'sCOMPLETE UPPER RECEIVERS The highest quality Bolt Carrier Groups you can buyBOLT CARRIER GROUPS READY WHENYOUARE.