But at what point does a conversion replace the entire interior, the fact is that anyone can build a fully automatic airsoft gun without ukara, create their own chambering mechanism for pointed ovoids - made from any tubing, and they have a weapon. UKARA and airsoft is only attached to the RIF elements.
Want to buy a gearbox, barrel, battery (?) go right ahead.
IF anything, the airsoft RIFs are safer than a wooden box with a gearbox and barrel, at least they would create duck and cover fear - unlike say, an umbrella or any cardboard/wooden box, cant say table leg unfortunately.