I ordered the DPMS tool. Actually the Tapco was $.49 more expensive.
Now, is there any place to get instructions on taking my forearm(handguard) off? I have a DPMS Oricle, and in front of the handguard there's a short "block" with 4 picatinny slots on the top. I can't figure out how to get that off to facilitate removing the handguard.