Well, do you think it would come off and then go back on? I want to take a picture of Prime beating him with it. xD
Take two photos; one of Prime holding Leader Starscream's arm with the rest of the figure still attached, then the second with Leader Starscream in the position that you want him to be in when Prime is beating him with his own arm (probably with the "arm-less" side hidden from view. Then, just photoshop as needed and voila! Prime beating the crap out of Starscream with his own arm and no risky toy disection needed.
I'm fairly sure nothing is glued up there, so yeah, it should be able to come apart with some tool magic.
But the real question is: How would one go about taking off Starscream's arm with Optimus Prime's arm? He doesn't even have articulated fingers.
I'd definetly appreciate seeing these pics once they're done, if you follow Autobot Burnout's advice.
I actually unscrewed it. I was worried about springs and stuff in the ratchet but guess not lol. I'm gonna post the pictures once I take them. lol