The F6F included provisions for carrying extra external fuel tanks or two 1,000lb. bombs, stubs for releasing six HVAR 5in. rockets and another armament arrangement comprising two 20mm cannon and four 50cal. device firearms or the standard six. 50cal. firearms. A smoother closer fitting cowling had been put around the P&W R2800-10W engine. At 23,000 ft. the F6F-5 would travel at 380mph, using just seven moments to climb to 20,000ft, the trunk window was eliminated on all but a few of the very early F6F-5s.930 of the model Hecat were supplied to England during WWII and soon after in smaller quantities to France and Uruguay.