Presma ar armorers wrench artl08 - Presma AR-15 5.56/.223 Combo Wrench / Armorer's Tool

Seth (other comment here) youre doing something wrong if youre rounding out your wrench after 2 uses. This tool isnt made that cheap. Its your method or barrel nut siezed on your AR most likely.
First wrap your AR in a towel, YOU MUST PLACE IT IN A VISE, apply a tiny bolt breaker or wd40 on visible threads of barrel only, take propane torch, heat up the nut on all sides (heat each side about 5 seconds at a time) do not heat for more than a minute total. You just want molecules to expand by microns, THEN place wrench on barrel nut fully and use a malet to tap it open slowly. Some even try barely tightening the nut then loosening it. If your AR has been fired any number of times your nut could be seized and its common. If youre just changing it out from a brand new kit it should come off easy.
This wrench is fine. Its better than all the other cheap ones here comparable. If this fails use a pipe wrench. If youre looking for another armorers wrench i suggest TruGlo, not MagPul. MagPul wrench is a rediculous price and TruGlo is acceptable and as good or better than magpuls version.