One of the difficulties is, adding more shots per round or increasing damage is not viable. More shots would increase the chance of a critical, while increasing the damage from 1 to an arbitrary number would result in speeding up combat a bit or being an instant kill weapon. Criticals are termed a something that puts a character down and out without zeroing out their endurance.
For this reason, the new weapons must be more limited but still useful. In the case of a stunner, a critical always blocks the enemy from taking their next action, which is useful. The body pistol is like a tiny sidearm that can't punch through utility suits let alone armor. The upside is it can be concealed from searches. Both make sense in the setting as they can't damage vehicles at all, which is a bonus when the vehicle is keeping you alive.
One quirk of the sidearm is anyone can use them, but the rules specifically say that certain characters can't. I believe the spirit of the rule is someone without training is ineffective. A to hit roll requires a number greater than 1, as you must roll under your combined marksmanship skill and the tech level of the weapon. For Duke has a Marksmanship of 5. With the standard TL-1 sidearm, he hits on a roll of 2 to 6 and misses on anything higher. For a medic with no marksmanship ability, he needs to roll under the TL of the weapon, which is 1 to 6. So a TL-1 gun won't work for him. What about a TL-6 weapon? He would hit on 2-6, which is a little weird.
This is a small device that uses hand-to-hand ability to strike either in melee or at a distance. It is available from events where sidearms are available at the same cost. A box of 20 takes up 2 CU.
To hit with a stunner, the character either shoots or swings it in melee. Add the character's hand-to-hand rating to the weapon's technology level. If the roll is under this value, a strike has been scored. If either of the dice is a 1 or 6, the target has been hit for a critical. Merely striking does no damage, a critical is needed to have any effect.
When a critical scored, roll one six sided die. On a roll of 1, the target is unconscious for the rest of the day. On a roll of 6, the target is down for 6 combat rounds (30 minutes). Any other roll causes the target to lose their next action.
A stunner does not cause physical damage and is useless against vehicles, robots, targets in utility suits or armored u-suit. Victims do not lose any endurance.
This "weapon" is usable by anyone, such as drivers and medics.
This is a small, short ranged gun that fires slugs. It is different than a sidearm as it can be hidden. If a character is searched, they can keep the gun hidden with a cunning roll. It is available from events where sidearms are available at twice the cost. These weapons are limited to Tech Level 3 or less, any higher roll will be treated as TL-3. A box of 20 takes up 1 CU.
The Body Pistol has tactical advantages at a cost. When shooting at a target, it does 1 point of damage on a hit. However, it cannot inflict criticals against vehicles, or targets wearing a utility suit or armor. The point of damage will not penetrate or damage a utility suit. it's the shock of impact and bounce that causes the point of damage to the wearer. Unprotected individuals can take extra damage or be knocked out on a critical.
Body Pistols are considered gimmick weapons and are only outlawed where all weapons are prohibited.