Better to have and not need, than to need and not have.
I myself am in dire need to find a modern combat arm for myself. The best I have so far is my '03 Springfield, and I just put a deposit on a P17 Enfield.
I find that firearms are also a good investment, they hold their value through the ages if kept well preserved. The value of some go up, and others stay the same. This is better than the other thing I "invest" into, cars!