[lurkingknight]

only a redesign of the outer barrel and hopup unit is going to eliminate this issue. The materials used and or the method of the merge between hop up and outer barrel is weak.

The barrel moves backwards and forwards on that lug due to the blowback movement and the forces exerted on the barrel during the blowback.


even on duster there are complaints in japan about these 3 ploblem areas, (front of the slide, outer barrel and hop up) The difference is they don't care as much since they have access to the factory parts service. The replacement parts are about 30 bucks total and the pistol itself can be purchased NEW for around 120-150$

There's no reason to redesign it or make it out of any better materials when replacements are so cheap.


The hop up and outer barrel need to be redesigned, both made out of steel. The hop up instead of having the pegs needs be tapped and threaded. The outer barrel needs to thread and screw into the hop up, only then are you going to get the surface area to spread that kind of load. Steel might be overdoing it, aluminum could probably handle it, but it's soft. You can cut aluminum with an xacto knife if you want. It's not exactly a great metal to hammer at constantly.