Rebuild a faulty coil roofing nailer This five dollar find is working like new for less than $15, let me show you what I did.
buy trigger valve here; https://amzn.to/2SXSRBq
buy Oring kit here; https://amzn.to/2YwDKnT
buy Bostitch coil nailer here; https://amzn.to/2SXQ1MT