Pistol Crossbow

[Skvez]

When discussing a pistol crossbow we're discussing a range weapon.
I can fire off a bolt with a pistol crossbow and still have my "sharp stick / machete / chainsaw" in hand for when they close to melee range.
A pistol crossbow in the ribs might not stop someone dead but it will mean when they close to melee range they're operating at degraded performance. (And unless they're desperate they're probably considering a tactical withdrawal)

As for penetration a 50 lb or 80lb pistol crossbow can penetrate most typical clothing. If you're attacked by a biker gang in heavy stuffed leather jackets; penetration may be a problem but how many attackers are going to have improvised body armour?

Even missing with a crossbow bolt will make someone less likely to pursue the attack than you just standing there and waiting for them.

There are very few scenarios in which a single person can defend against a determined mob irrespective of what weapon they have.

A shotgun blast is LOUD. Many people will run from the sound of one but others will creep towards it to see what's going on and whether there is any opportunity to profit or any leftovers to take. Pistol crossbows are very quiet.