I dont understand why people are making a big deal about the assassination weapon. Its not some rare 3000$ gun that's usually bought by collectors because that makes the trail back to you exponentially easier to track, It was probably just some generic semi-auto pistol with a homemade suppressor on it, and it was jamming because you don't just go out and test a suppressed pistol for reliability/tuning in NYC, doubly so when you're gonna go use it to kill a CEO.
What's more interesting to me is how effectively the guy was able to go about this with the cards he was given, he cleared that jam like it was nothing. that's impressive to me, and frankly says way more about the dude than whatever disposable firearm he could get his hands on.
you do realise how hard these are to obtain for the average civilian, right?