The Midwest Industries Upper Receiver Action Rod is the ultimate tool for barrel nut installs or removal. It is excellent for removing stubborn/seized barrel nuts without damaging upper. Designed for muzzle device installs, the action rod will not damage index pin. Can be used to install forward assist/port door cover. Compatible with forged and billet upper receivers. FeaturesMachined from 4140 Ordnance grade steelDurable Black Oxide finished for years of useWill not mar or damage exterior of upper receiverReceiver mounted sights can be left installedCan be installed horizontally or vertically in bench viseWorks with any standard LR308/AR10 barrel extension Notes: Not compatible with DPMS G2 308 or Daniel Defense AR-10 style rifles