The new nail guns that are magnesium and lightweight? What's the word on these? I saw one from Bostich. I noticed that the mail 1/4 air nipple screws into a plastic female threaded opening on the gun. Sometimes I take off the air nipple and use it on other tools, and I thought that this female opening on the gun could get worn down with constant removal and replacement (I probably wouldn't do it that often but it concerned me). It looked sturdy enough, but who knows--it could possibly crack, no?