Bostitch n80 does not feed nails

Make sure that the feeder spring is not broken this stops nails or can jam them or cause them to skip. Some nail gun types work bette if you buy their brand of nails, but it could possibly just be dirty or maybe check the nail size. You should also have a way to adjust how far your nails are in the bucket where you put your nails, it should go up or down by spining it.

Also, if the spring is not the culprit ont the other side of the feed pawl ( the little thing that looks like fingers) ok then on the door there is another spring latch and make sure that one is working too. ok then if both parts are operational then the issue may be inside and its pretty simple. take a 5mm hex key and a 10mm wrench or socket and take off the cover and the magazine, ( basket) set them out of the way and flip the gun over, and look at the nose part the bolts holding them on are 6mm hex so if you have a vice or something else to hold the gun in this position you will need to take out those bolts and remove the nose part,
when you have it off, look in the little hole off the side, leads to the smaller piston which makes the finger move when the trigger is pulled and shoots a nail, a burst of air is shot down this hole an makes the finger move back to grab the next nail. sometimes inside the gun the rubber bumpers get chewed up and leave little chunks of rubber inside which get caught in the chamber and don't allow it to advance properly. you will have then to take off the cap and firmly grasp the cylinder and pull straight up and out and from here you can see any debris too, you can use regular soap and water and clean the inside and dry it good, along with the cylinder, put it all back together and lubricate the oring s with a light coating of grease. should be back in business.