Mine is pretty quite, rapier is allot louder but i just got it. Wd-40 aint to great on rubers and plastics and silicone cant hurt anything so i dont see how wd-40 is better. I think lube that is thick may cause a malfunction but a low wt lube like 10-15 is pretty thin and allot harmeless. Some builder told me wd-40 aint good for a few reasons one being its not good incase it drips on the skin but the amount you put on can stop that. I cant see how thin lube can hurt but wd-40 wont.

How do i take it apart to wipe piston down ? I got no instructions or anything, no shirt, stickers and i bought 2 in a week lol Just joking but instructions would have helped allot.