The two pictured are just examples not the actual guns. I can turn any g&g m4 with a etu into either a blade trigger or hair trigger, for blade trigger it costs $80 installed and for hair trigger its $40 installed. You pay shipping for the gun both ways if you already have it, or I can buy the gun for you but obviously that will be added to your total here. For guns pictured it would end up being around $370 for instance, just to give you an idea.