Of course the police union lobbied for more.
They have armored trucks and undercover vehicles. They have mobile towers to survey. They have closed circuit cameras at every major intersection. They have Stingrays. They have purchased LRADs which can permanently deafen. They have helicopters, tear gas cannons for hundreds of officers, batons.
And they trot it out for peaceful protests. The police did not come equipped to protect, they came equipped to escalate and occupy.
Hell, they even manage to bust a lot of the equipment out at concerts and festivals. I stopped going to a local outdoor concert series when they decided to gate a park off and start pat downs and metal detecting everyone who entered.
I'm pretty sure you're talking about Buffalo, NY.[1] They purchased 115 semi-automatic rifles that use the same .40S&W ammunition as their pistols. That's the opposite of "high powered". And they're not fully automatic. They can in no way be construed as assault rifles.
The 450 vests they bought are resistant to rifle rounds. Their old vests could only stop pistol rounds.
I agree that many departments go overboard, but this doesn't seem like an instance of that.
1. https://buffalonews.com/2017/03/07/buffalo-police-to-get-new...