CQB MRP™ piston conversion kit with M16 Full-Auto piston bolt carrier Group, H2 Buffer and 16" chrome lined 1:7" twist 5.56mm barrel.
Piston Conversion Kit Includes:
Barrel 16 inch Chrome Lined, 1:7 Twist
Caliber 5.56mm
Bolt Carrier Group M16 Full-Auto
H2 Buffer
Gas block with intigrated gas piston LMT conversion