Naw, that gun holster is designed for Happ 45 caliber guns. It will work with any gun that has the same sized barrel. It will not likely work with the Top Gun though as it has a huge barrel section. I have never found an actual holster that will work with my Namco GunCon2's (very similar shape to the Top Gun). There are plenty of threads about holster ideas, so you might try searching.