It's higher than that (much higher). It can release weapons from it's internal bay virtually over it's entire envelope. Certainly up to Mach 2.0. (If you think about it you'll realize why it's a must-have.) There's at least one F-22 pilot who's been quoted saying Mach 2.0 at 60,000 feet. Jay Miller's F-22 book mentions several tests that were pretty impressive.
First guided supersonic launch of an AIM-120 was on Nov. 5th 2002. Mach 1.5 at 35,000ft.
Nov. 22nd an AIM-9M from Mach 1.4 at 24,000ft.
Jan. 2004 AIM-9 launched from Mach 1.2 and 100deg./sec. roll at 5,000ft.
Feb. 18th AIM-9 launch "at high roll rate" at Mach 1.4 at 10,000ft.
March 18th. AIM-120 launch at Mach 1.5 at 15,000ft.
June 10th AIM-9 launched at Mach 1.7, 21,000ft while pulling 4gs.
"There I was. . ."