L.E. Wilson case gage! An absolute must for reloading for the AR.
I use the RCBS AR series two die set (5.56/.223), it has a vent hole to keep your shoulders from denting if you over lube. It has a built in crimp if you choose to use it, and also sizes slightly smaller than most .223 die sets.
Save your brass or get some once fired LC brass.
Tumbler is needed also
Lock and load, the zombies (democrats) are coming (to take your guns)!