I just saw the late news segment on Trump's statement. I find the choice of language interesting.
He said that his administration had conducted an investigation to see if bump stock devices like the one used in the Vegas shooting were legal under current law.
He did NOT say they were illegal.
He said the ATF is going to propose a regulation change....
He also mentioned raising the age limit to purchase to 21...
The devil, of course is in the details, and we will have to wait a little bit before we see what is actually proposed.
He's against anything that would turn a regular rifle into a machinegun.
Here's where the serious risk comes in. Expect to kiss "bump stocks" goodbye, but bumpfire stocks are a novelty item. A fun range toy, but their use in Vegas is their death warrant in the public mind.
And, personally, I prefer them to "grab" (restrict/[prohibit) bump stocks, rather than the semi auto rifles they fit on. Despite the fact that it is wrong, in principle, I don't think there's any saving that particular baby this time.
If we "give" them bump stocks, its possible the wolves will lose momentum. Because, they won't rest until they get something...and the longer they chase the sleigh howling, the bigger the pack gets. And, its a sad fact but our system that when enough people demand something be done, something will be done, and politicians tend to listen to the loudest voices, and the wolves howl louder than we do.
The serious risk to our continued ownership of semi autos will be in the exact language used in the proposed regulation about "things that turn ordinary rifles into machineguns".
Rate of fire is almost certainly a term that will be used. Personally, I think it will probably used in such a way that it will could be interpreted to our detriment. Rate of fire covers both the cyclic rate of the firearm, and the rate a skilled user can fire it. Depending on what the language of the proposed regulations are, they could have huge unintended consequences.
As far as raising the legal age to purchase a rifle, that was set in law in 1968. The President cannot change that. Its not a regulation, its a law. Congress can change the law, the President cannot. But, he can ask for the change, and sign it, if Congress passes a new law.
We need to look closely at what is actually proposed, not what is talked about in sound bytes.
Whether or not Trump "betrays" any promise or not is not the issue to be concerned about here. There's other places for that.