It was mentioned in my ZA thread that one should keep spare parts for your firearm around and I agree wholeheartedly. I have AK parts, AKV parts and a spare BCG for my AR, but nothing else. What other parts should I consider keeping for the AR and what kits have you seen that you like (I've looked at a few)? What parts for a Striker fired pistol would you keep (Shield Plus)? I have all the tools I could ever want both at home and in my range bag, but what along that line would you recommend also? Another thing is where to find pistol parts as they don't really make Shield Plus parts kits, that I have seen?