[Dynamo]

where there's a will there's a way.
i could make it work in a week end.
frankly i hate the way airsoft M4 recivers have that back buffertube extension.
it could be made so much better.
also i could make a new type of expanding bushing that you'd thread the stock bolt through that would grip the inside of the buffertube, instead of the current method.
just tighten the bolt untill the buffertube is snug, then tighten the buffer nut.
i think i'll make a model in 3D and see what i can do.