About this 3D model

This is a hop up unit for ICS AK74 The original part is easy to crack, So I design this enhanced part myself.This part has been tested on my AK74 over a thousand shots and has been modified to enhance air tightness. I think its durability is acceptable.I only tested it on ICS AK74, but I guess it should be applicable to other rifles in the same brand. #Airsoft3D