NerfGnome

All I see for pictures is a line of red Xs. But it could just mean that your photo hosting site hates my computer.

My first nerf gun was the Big Bad Bow, back when it was first released. I broke it back then, and never really got back into nerf until recently.

It sounds like your plunger isn't working as well as it should. Perhaps some e-tape + silicone lube around the plunger head is in order. Does it seem like there's a decent amount of air volume coming out of the gun if you dry-fire it without the chains in? Mine has a fairly high air volume output.

I did open up the gun and put some e-tape + lube on the plunger head, back when I first modified it. But That didn't seem to help.

I thin you problem is in the chains, and not the plunger. Take the chain off and fire a shot to see if it will push air. I most likely will.

when you attached the cpvc to the base of the chin you have to make sure bno glue if on the outside of the tube. The base of the chain is supposed to slide through the grove on the top cover and if it doesn't go through smoothly, the timing of the chain and the release of the plunger will be off, and result in no firing. Trim the glue around each tube.

ohh just remembered, if the tube is not exactally the same size as the rotation piece, you will have to make the tubes thicker.

You want to try and make the chains as close to stock as possible dimensions as possible. I would have suggested that you put tubes inside the stock chains but I think that is too late now.

Thats not what i meant; I have the stock chains, and I nested CPVC (now its PETG) into the stock chain barrels, using e-tape as support (wrapping e-tape around the PETG). Long story short, I'm modifying the chains, not replacing them.

I just replaced the CPVC with OMC PETG, and it seemed to shoot more often. But it still only shoots half of the chain every complete revolution (8 shots). The main problem now is that the top flap flips up at random when I fire the blaster, and the chain flys forward and off the gun.