My grease gun has held through thich and thin for almost a year now. When I first got it I had to run 134a through it, but I later did alot of modifyting to it to run green and red gas through it. Mainly a flow restrictor, and gide rod bushings behind the bolt to keep the springs from binding up. One time the bolt cracked up into pieces but that was easily remedied with superglue. But in all If you want a grease gun just for the fun of having one, then go for the hudson one. I it may take a little work, but in the end its a great gun. Its no doubt the funnest to shoot, because it just 'rat-a-tats" away, and feels like its going to shake itself to pieces. Which is great fun!