Alright, if the time bubble cleaned up the gun, Terminator and time machine, I can buy that. I would have liked the characters to have shown some concern and talk it through, but I can buy that reasoning.
About the gun gag, I loved it being hidden in the thigh, but it was a punchline without a setup. There was no need for it. And if it's going to be metal hidden in flesh, why not make it a future gun that's gone through the time bubble? The scene felt like a compromise of people in a room that can't see the big picture. Like it was supposed to be a future gun and then for some reason, they decided it couldn't be the future gun so someone observed, "We don't need the thigh gag anymore," and someone else said, "No I like the thigh gag. Keep it."
About the gun gag, I loved it being hidden in the thigh, but it was a punchline without a setup. There was no need for it. And if it's going to be metal hidden in flesh, why not make it a future gun that's gone through the time bubble? The scene felt like a compromise of people in a room that can't see the big picture. Like it was supposed to be a future gun and then for some reason, they decided it couldn't be the future gun so someone observed, "We don't need the thigh gag anymore," and someone else said, "No I like the thigh gag. Keep it."