I just tossed away my MIC (Made in China) grease gun. I have a hard time removing it from the Zerk fitting, hard time to pump and prime, causing a mess each time I use it. When it can't pump the grease in, nothing I can do but remove the bearing and pack manually, a big job!! If I am in crunched time, I am screwed. Enough is enough. A happy camper got to have a reliable tool. So I order a new pump from Amelite on Amazon for $50. It is also MIC, but it is the most expensive, with best review, and name-brand. I also figure out a trick. If the grease can't be pumped in (like having a blockage or something), just remove the Zerk fitting and use a 0.2" dia rod as a piston pump to clear out the blockage.