Notes

Every Primary crits on head shot unless it is said otherwise
Huntsman: Fires arrows That do 10AT and can be lit on fire be friendly pyros so it also has afterburn.
Sydney Sleeper: on hit apply jarate to the target, No random crits, No crits on headshot, instead do mini crits on head shot making the damage +5.
Bazaar Bargain: Each headshot kill makes scoping take two less actions.
Machina: +1 ATK Can only fire when scoped in, Can hit multiple targets at once, fires tracer rounds.
Hitman's Heatmaker: Gain focus with kills and assists, Use one turn to activate focus, Focus gives sniper 6 actions per turn for 2 turns. Can activate it whether the meter is full or not. -2AT
The Classic: Can charge up without scoping, can't headshot until fully charged, -1AT

Cleaner's Carbine: Damage with this builds up the meter, when the meter is full, use one action to give yourself mini crits for 2 turns, no random crits, -1AT
Darwin's Danger Shield: +3 D to fire, and immune to afterburn
Cozy camper: Regen 4hp per turn, When aiming, you can't flinch (scope moving due to being attacked)

Tribalman's Shiv: On hit, deal bleed damage for 2 turns -2AT
Bushwacka: if you are suppose to mini crit an enemy, instead do FULL CRITS, no random crits, -1D
Shahanshah: +1 AT when over half hp -1 AT when under half hp