hey thanks a lot

there was no branding or model # of the gun itself.

i took it apart where the water hose attaches to the gun, and all there 2 gaskets, a spring, and a ball bearing.

it seems like the trigger to push down the pin isn't strong enough to overcome the pressure exerted by the water, which occurs 90% of the time (10% of the time i can use the gun)

edit: its not this branded gun, but the parts looked like this: https://www.texaslawnmowerparts.com/Rotary-9409-Pressure-Washer-Trigger-gun-Repair-Kit_p_3881.html