Improving what you already have
There is nothing wrong with putting some money into the firearms you already own. For some reason people think that putting a $100 gun stock on an SKS is a waste because you’re spending close to 30% more on your investment. Well, I am one who has come to the conclusion that firearms should be customized to the operator. The good thing about the stock options you have today are many of them are adjustable. I remember when I was a teenager and many of the rifles that I was shooting were too long for me, now I have trouble getting kids to shoot some of my guns because they are too long.
Guess which firearm is the easiest for me to teach knew shooters that are teenagers and still growing? You guessed it, the M4 Carbine. The adjustable stocks are really meant for people that wear body armor, but I have gotten good use out of my Magpul stocks, the PRS AR15 sniper stock also has an adjustable cheek weld which is something that you will learn to appreciate especially if you are not sure about which optics you are going to use on the gun. The Magpul CTR stock is by far the biggest seller because it is easy to adjust and lock in place.