Thanks for the feedback, guys!
@SuperCriollo - Sorry for my late reply. I strongly recommend -not gluing the gasket, in case it needs replacement. You should be able to use your finger to slide it back into the groove. If it's to loose, then it may need replacement. Also, if you can't slide it into place, because the plunger is almost pushed into the grenade, push the opposite side down, until the plunger comes out, reposition the gasket, and push the plunger back in. This happened to me once, and this fixed the issue.