so now we are going to working on the receiver mechanism so first thing I have to do is modify the head of the cylinder this is going to push the paint ball and this is a viral I'm going to add this side I'm going to cut a slot so the tank will have for you this is made of nylon with let's say that a piston it has to be shaped new cylinder so it can fit inside the tube yeah Rudy in tight fit not very tight but as tight as possible this will push the pink ball and the air that comes out from q AV will sit here it has to be a zinger in this and so the air has faced pass I made this from a blonde nylon it made on my drill press I have a video about how to make pistons on drill press you can check out the way that you put it here I made m6 writing the same angle cylinder it's a match so this one stayed here we have the viral now you have a cylinder check out the extension of these in case there is no air inside and there it air see the maximum expansion put it here use a ruler to figure out where the sloth should be then cut it now I have finished cut the slot here in the piston it's X inside and you can see clearly the head Oh spaceman right there here is it going to be connected to the hopper now I have to find out with a cylinder expand maximum links and we check out there to glue the hold for the air of the QV to pass so now I have connected the cylinder to the viral receiver but I used tape around here it's better use fiberglass breathing and epoxy to report it but right now it works here goes to the paint ball or whatever here goes to the exhaust form of the QV right now I'm going to show you a simple way to connect them together which using a piece of PVC pipe both the cylinder and the barrel face inside the PVC pipe you can see the fits perfectly now we only have to drill a hole for the pinholes oil and another how to connect PV by using the ruler or just by eye I mark the two positions of the hole the first one I'm going to use a 10 millimeter drill for the receiver and then secondly I'm going to use an 18 millimeter drill take the fitting I need to fit the key so if you can't see I finish this slot now I don't have to glue everything together right now you'll hot glue and but to have the gun with a reliability I would suggest use epoxy or something strong enough right now how cool will do the trick so now see it's finished here this is connect to the chamber to cylinder so when the chamber is charged in the normal condition which leads with the cylinder will expand and push the paint ball about this position then fires so here is a trigger see is actually quite comfortable OPA configuration now I have glued a half inch fitting here you can put a hopper just by threading on eels half inch sidings so this is the finished car I gives little paint also I add just a little bit to the pressure on this side so the the cylinder will retracts completely for reliable loading right now I'm using this air tank with a precise regulator but you can use a normal paint ball tank with a regulator and I also have a video about how to turn down output pressure of a paintable regulator for safer use so learn I see how it works we'll try some low pressure okay now I see piston see it has fully extended okay now if I the retract we release the trigger expand and retract also can feel a really nice recoil by the kicking of the piston of the cylinder