Welcome to GTA Chris, nice to have you with us

Congratulations on your new Whisper .22 , I don't own one but quite a few of the GTA members do so I'm sure they'll chime in and give you all the info you may need on the rifle. When you get your rifle check the trigger blade with a magnet. If it's made of metal then you're in luck as that means that the GRT III trigger replacement will be a drop in fit for your rifle. If the blade on your new rifle is plastic, which is the "newer" model, then the GRT won't work. I have quite a few GAMO rifles and I like them very much and have served me well as hunters over the years, but one thing is almost always true with them..... the stock triggers are stiff and just overall lousy. The GRT drop in replacement literally transforms your rifle, it truly is amazing. All but one of my GAMO's have the GRT trigger and it's the best money I ever spent on my GAMO rifles. The one rifle I have that still has the stock trigger is the only GAMO I have that actually had a real decent trigger from the box so I left it alone, but all the others were swapped out immediately.
Anyway, again, welcome and I'll be looking forward to you posting the details and pics of you and your sons hunts in the "Hunting Gate"....
Oh yeah, I forgot,,,, do yourself a favor and order a pellet sampler from straightshooters so you can find out what pellets your rifle likes and what pellets it hates. Each rifle has it's own pellet preferences and the sampler pack lets you identify the best pellet quickly and without having to just guess and order expensive amounts of pellets. Once you find the right pellet then you can stock up on them. Here's the link for their .22 caliber sampler...
http://straightshooters.com/straightshooters/samplercontent22.htmlJeff