Description:
Will fit M4A1 AEG.
Inner Diameter: 6.01mm
Material: STKM13C
Tolerance: +-0.007mm
Weight: 86g(Not Include Packing)
PDI adopts QPQ to give the sear durability, anti-rust, and blacken.
Particularly, QPQ's corrosion-resistance, fatigue-endurance, and abrasion-
resistance are better than hard chrome plating
