Features: Works with LR308 and AR10 308 barrels and receivers Ultimate tool for barrel nut installs Excellent for removing stubborn/seized barrel nuts without damaging upper Designed for muzzle device installs and will not damage index pin Can be used to install forward assist/port door cover Compatible with forged and billet LR308 and AR10 upper receivers Machined from 4140 Ordnance grade steel Durable Black Oxide finished for years of use Will not mar or damage exterior of upper receiver Receiver mounted sights can be left installed Can be installed horizontally or vertically in bench vise 100% Made in USA *NOT COMPATIBLE WITH DPMS G2 308 ArmaLite and AR10 are trademarks of Armalite Inc