You know how there are screw-in silencers? Is there such a thing as a screw-in barrel extender?
You could carry your 7inch longbarrel handgun everywhere, and the screw-in extender in a separate place perhaps strapped to your leg. Best of both worlds, if it works.
Apparently there are barrel extensions. Up to 8” as far as I can tell.
https://www.google.com/search?q=screw-in+gun+barrel+extension&ei=OA_SYYN-tKmq2w-RtYDADQ&start=30&sa=N&ved=2ahUKEwiD-uGF-JP1AhW0lGoFHZEaANg4FBDw0wN6BAgBEEo&biw=1366&bih=625&dpr=1