I don't remember them exactly after taking a quick look, I thought the exact same thing.
Off the top of my head

Starter Pistol is 0.3 freeze with a 0.8 firerate, 5 damage with a high reload in the 0.6-0.8

44 Navy Magnum is 0.24 freeze with something like 0.7 firerate, 6 damage and about the same reload as the start pistol. 1.3k

Sawed shotgun I didn't look at the stats of but i'd assume its 0.3 firerate, 2 clip, 2 bullets, 0.8 firerate and 6 damage. 2k

Pearl handgun 0.2 freeze, 0.7 firerate, 7 damage and 0.5-0.6 reload. 0.8 spread, 6 clip. 3k

Repeater 0.24 freeze, 0.36 firerate, 6 damage, 0.7-0.8 reload, 0.8 spread, 16 clip. 3k

At the moment repeater rifle is probably the best, pearl gun is not a contender as 0.04 freeze isn't a huge amount at the cost of almost a twice as slow firerate, and 10 less bullets. IMO it would be more useful if the repeater didn't have such a high clip, 8 bullets would have been enough since it's firerate is basically twice as fast as any other gun, and especially with the horses that give no freeze in reload or firing, you can just ride around spamming it and there isn't really anything you can do but try run away

The repeater rifle is also the dominant spar gun, if you have any other gun it is almost guaranteed you will lose, skill doesn't really count for anything since the run speed is so slow and the freeze is so high, when against a gun that shoots much faster than you, you can dodge the bullets but trying to fire back will just result in you taking damage from two hits. I've also noticed the bullet hit boxes seem to be off as i've taken damage from bullets that aren't coming into contact with my character.
Also the bullet graphic needs to be updated, 4 by 1 pixels is not large enough and you can barely see it in the outside spar arena