Hybrid 6.01mm Precision Inner Barrel 247mm for CAR15, P90, G36C, SIG552
1st Class Stainless Steel + Aircraft Aluminum Alloy.
Extremely Straight with High Rigidity and Accuracy Guided by an O-Ring to reduce barrel vibration.
Comes with a Modify 2-Ring+ Hop-Up Bucking, Airtight up.