fender flare tool

A hundred dollars well spent?
So I got a hundred dollars from a relative to buy a Christmas gift for myself with. I recently purchased a Stag Arms model 1 carbine and am going to use this money to buy some accessories. I do not want anything tacticool or frilly (no rails, lasers, bayonets, grenade launchers, modified shotguns, flare guns or any of that junk). I am thinking that I will get two of magpul pmags ($30), a two or one point adjustable sling (about $30), a D-fender D-ring ($10), an Iosso AR-15 cleaning brush set ($12) and I’m running low on lube so some breakfree clp ($10).
Now the question is how would you spend a hundred bucks on USEFUL accessories? Remember, no worthless junk and I’m trying to keep the gun simple (iron sights, no quad rails, no lights or lasers). What do you think of my list? What would you do differently?
Side question: Has anyone looked at that samson manufacturing field survivor/ survival tool? It looks pretty nice and I might buy one when I have some more cash.
That sounds like a good list to me. Ammo would be more fun though.
eastontruckcaps2.mp4