As for the subject; title says it all.
Problem? The upper receiver on my G&G F2000 won't budge when I try to separate it from the lower receiver. I push the body pin to it's required position, but the upper receiver just WILL NOT move... Does anybody have this problem? It may be because it is the newer model, but I honest to god have no idea. (When I watch reviews, people can pull the thing off with no struggle at all, but all of the videos are of the older edition.)
EDIT: I got it off, it just required the force of a thousand suns and cost me a blown out forehead vein... If this could be removed, I'd be more than happy.
Thanks!