just posted a schematic
THanks for the recommendations. Also I posted a schematic with the help of tinkercad.
With that weak 12 volt battery, the buck converter is sucking it dry. You need to get a much stronger 12 volt source!
How do you mean a stronger 12v source? Something with more amps?
Take the watts required by the buck converter and double it. That is the watts the battery should be able to supply for your project. You can compute the amps needed for that number of watts.
How would I know the watts required by the buck converter? I don't see it in the specs. Just the output of the buck converter which is 5.2v 6amp 30watt
related to the gate capacitance
It's not about the current, it's about the charge carriers.
Just a suggestion though. I agree that switching time isn't the problem here.
Not sure if there is a battery here. Isn't this a 12V wall wart, connected to a buck converter?
Anyway, OP, did you connect the solenoid directly to the 5V supply? Was it strong when you did that? Because that is the main indicator of whether any solution with an arduino will help. If it isn't strong enough at 5 or 6 volts, then it doesn't matter if you trigger it with the Arduino. You would need a bigger power supply and/or bigger solenoid. In my experience, I always need a bigger solenoid than I estimated.
From the website
6VDC operation (please note lower voltage results in weaker/slower operation)
Do you have an ohmmeter?
If yes, measure the resistance of each solenoid.
You may be able to operate them with 12V.
Yeah, the phenomena is called Aliexpress or similar.
Yeah I tried directly to the solenoid and still nothing. So yeah, thinking I need to try and run them at 6v somehow.
I have a multimeter. Would that work?
And no it's not a wall wart it is a battery.
Yes, just set it to read ohms on a low scale.
Make sure the solenoids are disconnected from anything
I figured this out they are both Ohms resistance . So if it does draw 2 amps according to the label I think just running on 12 could work?
Yes but you must consider the power dissipation. At 12V and 2A, that is 24Watts, so it will get very hot if you operate it for a long time.
Hi,
Have you measured the voltage across the solenoid when you activate it in your circuit?
Have you measured the 5 V converter output when you activate the solenoid?
Both standard troubleshooting proceedures.
Thanks.. Tom... 
Even at 6V it would be 6W. They are not designed for continuous operation because they could overheat.
I'm planning to have these be button operated, so they would not be used continuously. Is there anyway to help reduce the heat?
I have, both were about 5.2 v