You can conceal the handcannon. Plus the handcannon allows clever one-liner.Won't help much. Use an actual gun.
Even the nastiest handcannon with ETE does, what 6D6 damage? About the same as a 7.62 assault rifle. Which is a lot! But the AR does it stock -and- can burst fire. If you are fighting heavily armoured enemies, consider mono weapons, tasers, pulse weapons, paint, and of course, heavy weapons. 20mm +
Ooooooo ... pistol grenades, I never thought of that ... THANKS!One weapon that I had often used in the PnP and can be somewhat small is a small caliber pistol with some pistol grenades, HEP being the preferred. Those little suckers really hurt, even with a target in heavy armor.