Only one
this is literally the only tool I use to work on my AR15
AR 15 M16 Tactical Armorers Wrench Gunsmith Tool
A perfect all in one tool for your AR 15 .223 .556 for building, repairing and maintaining your AR 15 rifles. Use to install and disassemble free float tubes and most free float tube barrel nuts, castle nuts, and remove flash hiders as well as installing muzzle brakes for CA compliance.
Product Details:
J&E Machine Tech