UNICORN Nitroflon Coating 6.03MM Inner Barrel for AEG with Bucking

UNICORN Nitroflon Coating 6.03MM Ultimate Precision Inner Barrel For AEG with Hop-Up & Hop Up Knob/Nub and AEG Fixed copper ring. outer: 8.55MM inner: 6.03MM material: Brass electroplating nitroflon coating included: UNICORN AEG 60 degree Hop Up Bucking included: UNICORN 50 degree Rubber Hop Up Knob/Nub included: AEG Fixed copper ring